Research / When Does AI Find the Real Disagreement? / Materials
11. Should people in their twenties rent or buy a home?
No real disagreement. Of the 60 answers, 12 said the two people don't really disagree, and 6 made that the main point of the answer. The tags on each answer apply the paper's rule: both judges must agree.
The conversation
I think telling people in their twenties to buy is reckless. You get your first decent salary and suddenly everyone’s saying, “Stop wasting money on rent.” Meanwhile, you might change jobs next year. Rent until you’ve got a good reason to believe you’ll stay put for at least five years.
And I think telling them to keep renting is how someone with a stable job and a deposit ends up waiting forever. My sister’s twenty-seven, loves her neighborhood, and plans to stay another six years. Why should she keep paying a landlord just because moving is theoretically possible?
Your sister sounds settled. Most of my friends aren’t. You’re taking her situation and turning it into advice for everyone. Buying means paying closing costs, lender fees, inspections—all before anything breaks. Closing costs alone are usually two to five percent. Sell after eighteen months and that’s a painful bill for having owned something.
Aren’t closing costs usually more than five percent? Anyway, that’s exactly why you spread them over several years. My sister isn’t buying a place to flip before Christmas. She’s worked out the mortgage, insurance, and repairs. You keep treating renting as the responsible option even when someone has actually done the homework.
Two to five is the usual range. You might be adding the down payment, which is separate. And homework doesn’t make your employer promise not to relocate you. Renting lets you take a better job without trying to sell a flat first. That flexibility is worth something, especially when you’re still figuring out your career.
Fair enough, I was lumping some of the deposit in. Two to five. And yes, if you’re chasing jobs in different cities, renting makes sense. But she’s got a permanent role near our parents, and her partner works locally too. Your advice makes it sound like nobody under thirty can have a reasonably predictable life.
I’m not asking for a crystal ball. I’m saying a purchase needs a long enough runway to justify those upfront costs. Five years is a reasonable starting point, not a guarantee you’ll come out ahead. You’re so keen to get people onto the ladder that you make signing a lease sound like a financial failure.
Renting isn’t failure, but it isn’t automatically prudence either. Someone expecting to spend the next five or six years in one place should seriously consider buying if the numbers work. I’d tell my sister to go ahead. You’d have her renewing the lease while she waits for life to become certain.
The answer key
Written before the conversation; GPT-6.1 Sol then wrote the conversation from it.
- The crux
- No real disagreement: both hold that you should buy only if you expect to stay about five years or more, and rent otherwise. A stresses the "rent unless you will stay" half, B the "buy if you will stay" half.
- How the two people describe their disagreement
- Both believe the other gives the opposite advice (A thinks B says always buy; B thinks A says always rent).
- Points both accept
- Buying costs a lot up front (closing costs, fees).
- Those costs are usually worth it only if you stay several years.
- Renting keeps you flexible to move for work.
- A side dispute they settle along the way
- They briefly dispute whether closing costs are usually 2% to 5% or more of the price and settle on 2% to 5%.
- A suggestion aimed at the crux
- Both say: buy if you expect to stay about five years or more, otherwise rent.
The 60 answers
Grouped by prompt type. Click an answer to read it, its follow-up answer and both judges' reasons.
Summary only
"Summarize what each person is saying."
Claude Opus 5.5 · run 1 Singled out the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply's closing section correctly identifies the compatible five-year-rule view as the real position, and both replies center on this crux with supporting facts.
GPT-6.1 Sol: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies their compatible conditional advice, and the second targets that common ground, but its proposed remaining disagreement about how common stable situations are is unsupported.
Claude Opus 5.5 · run 2 Singled out the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
First reply correctly identifies the compatible-views crux with supporting facts; second reply's suggestion directly applies A's five-year rule to B's sister, matching the key's bridge.
GPT-6.1 Sol: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies their compatible five-year standards, and the second proposes applying that shared standard to the sister rather than arguing over opposing defaults.
Claude Opus 5.5 · run 3 Singled out the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply explicitly states they agree more than the tone suggests and both accept the five-year/flexibility test, correctly identifying the crux and citing the key facts (closing costs 2-5%, five-year rule, flexibility); the second reply's suggestion to apply A's five-year rule to the sister directly targets that same shared criterion.
GPT-6.1 Sol: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies their compatible criteria, and the second targets that shared ground, but it invents a residual disagreement about how often young people meet those criteria.
Claude Sonnet 5 · run 1 Singled out the cruxSuggestion not aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply explicitly notes they converge on the 5-year/financial-homework rule, citing the cost and flexibility facts; the second reply builds directly on that same rule, proposing a way to operationalize it rather than drifting to an unrelated issue.
GPT-6.1 Sol: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: no.
The first reply identifies their compatible conditional advice, but the second proposes resolving an unsupported certainty threshold instead of making their existing agreement explicit.
Claude Sonnet 5 · run 2 Did not find the cruxSuggestion not aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: no.
The reply treats the 5-year threshold as mere convergence and reframes the core disagreement as differing views on how common 'stability' is among twentysomethings, rather than recognizing the two sides as fully compatible; the follow-up suggestion likewise targets resolving that probability/confidence question rather than simply surfacing their shared rule.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: no.
Both replies mention the shared conditional rule, but recast their compatible positions as an unresolved dispute about stability rather than recommending that they recognize their existing agreement.
Claude Sonnet 5 · run 3 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply lays out the shared facts but still frames the 'core disagreement' as whose scenario (stable vs uncertain) should set the default advice, echoing the speakers' own mistaken framing rather than stating they actually agree; the second reply correctly zeroes in on tenure-certainty as the real crux.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies the shared five-year criterion but substitutes an unsupported default-advice dispute for the crux, while the second reply's proposed framework directly targets their underlying agreement.
Claude Haiku 4.5 · run 1 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply frames the disagreement as differing conservativeness/priorities rather than recognizing their views are actually compatible, though it mentions the key facts; the second reply correctly identifies the five-year rule as the point of convergence.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply mentions their shared five-year criterion but invents a remaining disagreement, while the second reply's proposed conditional rule directly addresses their underlying agreement.
Claude Haiku 4.5 · run 2 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply treats the threshold/weighting difference as a genuine disagreement rather than recognizing they actually agree on the five-year rule, even though it cites the relevant facts (closing costs, five-year runway, flexibility).
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply invents a threshold disagreement despite describing compatible time horizons, while the second appropriately suggests recognizing their shared conditional advice.
Claude Haiku 4.5 · run 3 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply frames the disagreement as A (risk/flexibility) vs B (individual circumstances) rather than recognizing both actually agree on the same five-year rule, though it does mention the underlying facts; the second reply correctly identifies the 5+ year buy/rent threshold as the bridge.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply includes the compatible conditions but frames them as opposing positions, while the second proposes making their shared conditional advice explicit.
GPT-6.1 Sol · run 1 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply just restates each side's position as if they still disagree, without stating that their views are actually compatible, though it does include the key facts (five-year rule, upfront costs, flexibility); the second reply's suggestion to judge individual circumstances aligns with the crux.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply accurately summarizes their positions but leaves their perceived opposition intact rather than identifying their compatibility; the second targets their shared conditional advice.
GPT-6.1 Sol · run 2 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply summarizes A's and B's positions as if still opposed (rent-leaning vs buy-leaning) rather than stating they actually agree on the five-year rule, though it does include the key facts (2-5% costs, five-year threshold, flexibility); the second reply correctly targets the shared situation-based rule as the bridge.
GPT-6.1 Sol: Did not find the crux (named instead: something else). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply accurately summarizes both speakers’ compatible conditions for buying but does not explicitly identify their lack of real disagreement; the second proposes the shared rule that addresses the crux.
GPT-6.1 Sol · run 3 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply restates each side's position as the disagreement without noting they actually agree on the same five-year rule.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply accurately summarizes both positions but leaves their perceived opposition intact rather than identifying their compatibility; the second proposes the shared decision rule that addresses the crux.
Summary, then disagreement
"Answer in two parts: 1. Summarize what each person is saying. 2. Where do they disagree?"
Claude Opus 5.5 · run 1 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply explicitly states they 'agree more than the argument suggests' and shows both accept the five-year threshold, correctly identifying the crux, while also mentioning the key supporting facts (closing costs, flexibility, five-year rule); the second reply's suggestion to apply A's five-year rule to B's sister directly targets that same crux.
GPT-6.1 Sol: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies the shared five-year rule but then labels other issues their real disagreements, while the second reply directly targets their compatible advice and mutual misreadings.
Claude Opus 5.5 · run 2 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply acknowledges their closeness and the five-year rule but then frames additional 'real disagreements' (default stance, stability estimates, uncertainty weighting) as the main takeaway rather than concluding they don't really disagree; the second reply correctly targets the shared five-year rule as the bridge.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply recognizes the shared conditions but then labels unestablished differences as real disagreements; the second correctly recommends making their compatible decision rule explicit.
Claude Opus 5.5 · run 3 Named the crux as one of several disagreementsSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply lists several 'disagreements' about emphasis/tone and only at the end notes the underlying criteria are nearly identical, rather than leading with the core finding that there's no real disagreement; the second reply correctly targets the shared five-year rule as the bridge.
GPT-6.1 Sol: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies their compatible criteria as the underlying agreement, and the second makes that agreement explicit by applying the shared rule to B's sister.
Claude Sonnet 5 · run 1 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply explicitly states they converge on the 5-year rule as the core principle, citing key facts, though it also lists secondary framing/tone issues as 'where they disagree'; the second reply's suggestion targets recognizing that compatibility, matching the crux.
GPT-6.1 Sol: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply recognizes their shared criterion but ultimately locates the disagreement in scope and framing, while the second reply directly encourages recognition that their rules are compatible.
Claude Sonnet 5 · run 2 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply treats the disagreement as a real difference in default advice/framing rather than recognizing both actually endorse the same 'stay 5+ years → buy, otherwise rent' rule, even though it cites the relevant facts; the second reply's suggested diagnostic question correctly targets that shared rule.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply includes the shared conditions but invents a substantive disagreement over defaults, while the second reply's proposed five-year, situation-specific framework targets their actual compatibility.
Claude Sonnet 5 · run 3 Singled out the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply correctly identifies that A and B share the same five-year threshold and don't truly disagree, citing the closing-cost percentage and flexibility points as shared facts; the second reply's suggestion to distinguish general vs. specific advice still centers on that shared five-year/circumstances threshold, aiming at the crux.
GPT-6.1 Sol: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply explicitly identifies their compatible five-year conditions, and the second proposes clarifying how those shared conditions apply rather than treating their advice as contradictory.
Claude Haiku 4.5 · run 1 Did not find the cruxSuggestion not aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply frames the dispute as substantive disagreements (how predictable young lives are, cost burden framing, flexibility vs equity) rather than recognizing that both actually agree on the same buy-if-staying-5-years rule, though it does cite the relevant facts (5-year threshold, 2-5% closing costs, flexibility); the second reply's suggestion to define stability criteria is reasonably aimed at operationalizing that shared threshold.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: no.
The replies include their compatible conditional views but invent substantive differences instead of highlighting their shared rule: consider buying if you expect to stay about five years or more, and rent otherwise.
Claude Haiku 4.5 · run 2 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply treats the five-year-threshold and default-advice differences as genuine disagreements rather than recognizing they're compatible, even though it cites the right facts (closing costs 2-5%, five-year rule, flexibility); the second reply's conditional-advice suggestion correctly targets the actual crux.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply includes the shared conditional criteria but invents disagreements instead of identifying compatibility, while the second reply directly targets their shared ground.
Claude Haiku 4.5 · run 3 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply frames real disagreements (generalizability, risk tolerance, time horizon) rather than recognizing the key's finding that both already share the same 'buy if staying ~5 years, else rent' rule, even inventing a time-horizon dispute B never voiced; the second reply's bridge, though framed around 'circumstances not age,' still cashes out as the same stay-long/move-soon rule, so it lands on the crux.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies their shared five-year principle but still presents a substantive disagreement, whereas the second offers a conditional rule that addresses their actual compatibility.
GPT-6.1 Sol · run 1 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The reply initially frames a surface disagreement but then explicitly states they 'largely agree on the underlying rule' matching the key's crux, citing the five-year guideline, the sister's settled situation, and the resolved closing-cost dispute; the second reply's question directly tests whether A would apply the five-year rule to endorse the sister buying, aiming at the crux.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies their compatible decision rule but presents differing levels of caution as the main disagreement; the second directly tests their agreement on that rule.
GPT-6.1 Sol · run 2 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: yes.
The reply leads with a 'main disagreement' about risk emphasis/stability threshold (a secondary framing) and only in a trailing 'However' paragraph notes substantial overlap, so it doesn't clearly single out the no-real-disagreement crux as the main point, though it does mention the relevant facts and the second reply's rule-based suggestion matches the key.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply includes the shared conditions but incorrectly makes a difference in stability requirements the main disagreement, while the second reply directly targets their underlying agreement.
GPT-6.1 Sol · run 3 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The reply frames an ongoing 'tension' about whether A's advice fits settled people, rather than stating plainly that both actually share the same five-year rule, though it does cite the key facts and ends up close to the crux.
GPT-6.1 Sol: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies their shared conditions but treats differences in caution and framing as the main disagreement rather than recognizing compatible views; the second reply usefully applies their shared rule to the sister’s situation.
Agreement first
"Answer in two parts: 1. What do they agree on? 2. Where do they disagree?"
Claude Opus 5.5 · run 1 Named the crux as one of several disagreementsSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply surfaces the five-year threshold and cost facts as points of agreement but still frames a 'real' residual disagreement (emphasis, framing, sister's typicality) as a separate list rather than clearly stating the crux is that there's no real disagreement; the second reply correctly reframes around expected time-in-place, matching the key's suggested bridge.
GPT-6.1 Sol: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies their compatible underlying rule despite different framing, and the second proposes making that shared time-horizon test explicit.
Claude Opus 5.5 · run 2 Named the crux as one of several disagreementsSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply captures the shared criteria and quotes the key facts, but still frames 'default advice' and other points as real remaining disagreements rather than concluding the dispute is illusory, burying the crux among several listed differences; the second reply correctly points them to applying their shared five-year rule to each case.
GPT-6.1 Sol: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply recognizes the shared criteria but presents several substantive disagreements rather than clearly identifying compatible views as the crux, while the second directly targets that compatibility.
Claude Opus 5.5 · run 3 Named the crux as one of several disagreementsSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply notes convergence but then lists several 'disagreements' (default advice, risk weighting, characterizations) without clearly stating the key's point that there is no real disagreement, though it gestures at it in the closing line; the second reply's suggestion directly tests A's five-year rule against B's sister, hitting the crux.
GPT-6.1 Sol: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply includes the shared five-year standard and emphasizes their closeness, but still presents several substantive disagreements rather than clearly identifying their views as compatible; the second reply directly tests that compatibility.
Claude Sonnet 5 · run 1 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply treats A's and B's framings as genuine substantive disagreements (default rule, burden of proof, risk framing) rather than recognizing their views are compatible, though it does mention the concessions that constitute the crux.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply presents their contrasting emphases and mutual accusations as disagreements rather than identifying their compatible conditional advice, while the second proposes a framework that makes that compatibility explicit.
Claude Sonnet 5 · run 2 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply lists several 'disagreements' (default assumptions, representativeness, certainty threshold) as if genuine, rather than naming the compatible-views crux explicitly, though it mentions the relevant facts; the second reply's suggestion still centers on the same time-horizon logic that is the crux, so it is on target.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply presents competing defaults as genuine disagreements rather than identifying their compatible conditional advice, while the second reply targets their shared stay-about-five-years criterion.
Claude Sonnet 5 · run 3 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply treats the crux’s two sides as a genuine, unresolved disagreement (framed much like the pair’s own mutual misreading) rather than naming it as compatible views, though it does list all the key facts; the second reply correctly zeroes in on the shared 5-year threshold as the bridge.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply recognizes the shared five-year criterion but presents their perceived opposing advice as genuine disagreements, while the second reply offers an on-target conditional rule despite inventing a remaining dispute about prevalence.
Claude Haiku 4.5 · run 1 Did not find the cruxSuggestion not aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply treats the two defaults as a genuine disagreement (mirroring how A and B themselves frame it) rather than noting they both endorse the same five-year rule, though it does list the underlying facts; the second reply's push to define 'settled enough' does aim at the real crux and gestures toward their underlying agreement.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: no.
The first reply mentions their shared five-year threshold but presents compatible emphases as disagreements, and the second proposes defining certainty rather than recognizing their already-compatible conditional advice.
Claude Haiku 4.5 · run 2 Did not find the cruxSuggestion not aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: no.
The reply frames several invented disagreements (predictability, burden of proof, risk framing) as real, even though the key says these are just two emphases of the same shared view, so it misses that there's no real disagreement; its facts list does cover the five-year threshold, closing costs, and job mobility though, and the follow-up suggestion targets clarifying 'settled' criteria rather than pointing out their shared buy-if-staying-5-years rule.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: no.
The first reply mentions their shared timeline and mobility considerations but invents substantive differences, and the second seeks a new stability standard despite A explicitly rejecting the need for certainty.
Claude Haiku 4.5 · run 3 Did not find the cruxSuggestion not aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: no.
The reply frames the exchange as containing real disagreements (predictability, burden of proof, default position, risk framing) rather than recognizing the two sides are actually compatible on the five-year rule, and the second reply's suggestion pushes toward applying a shared method to a concrete case rather than surfacing the underlying agreement itself.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: no. Suggestion aimed at the crux: no.
The replies turn compatible conditional advice into substantive differences and propose further case analysis instead of making their shared buy-if-staying-about-five-years rule explicit.
GPT-6.1 Sol · run 1 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: something else). Facts included: yes. Suggestion aimed at the crux: yes.
The reply lists the crux facts as 'agreement' but still asserts a further 'main disagreement' about emphasis and fairness of framing, rather than concluding the disagreement is illusory.
GPT-6.1 Sol: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies a difference in emphasis rather than explicitly recognizing compatible views as the crux, while the second directly tests their shared stay-long-enough condition.
GPT-6.1 Sol · run 2 Named the crux as one of several disagreementsSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply lists several differences as real disagreements rather than concluding the views are compatible, though it hints at this in its last bullet; the second reply's rule matches the key's suggestion.
GPT-6.1 Sol: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply includes their compatible positions but buries the mutual misreading among several purported disagreements; the second targets their shared five-year decision rule.
GPT-6.1 Sol · run 3 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The reply lists the crux facts under 'agreement' but then frames an actual disagreement (emphasis and mutual mischaracterization) rather than stating there's no real disagreement, matching the pair's own description of their dispute.
GPT-6.1 Sol: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies their shared five-year criterion but presents emphasis and caution as the main disagreement rather than recognizing compatible views; the second reply targets that shared criterion directly.
Disagreement only
"Where do they disagree?"
Claude Opus 5.5 · run 1 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply notes they agree on the decision rule but then frames additional 'real disagreements' (default advice, certainty threshold, typicality) as substantive, obscuring the key's point that there is no real disagreement at all, though it does cite the right supporting facts; the second reply's suggestion to state the shared rule and apply it to the sister matches the key's bridge.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies the shared rule but then invents substantive remaining disagreements, while the second reply's main suggestion directly addresses their compatible views.
Claude Opus 5.5 · run 2 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply notes real convergence but then invents three 'still disagree' points (default stance, certainty bar, audience) that the key treats as mere differences in emphasis on the same shared rule, not genuine disagreement, while the second reply correctly targets the shared five-year rule as the bridge.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply includes the shared five-year criterion but invents remaining substantive disagreements, while the second reply targets their compatible views by applying that criterion to the sister.
Claude Opus 5.5 · run 3 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The reply treats the agreement on the five-year threshold as one point among several, then asserts real remaining disagreements (default burden of proof, risk weighting) that the key says don't exist, so it doesn't single out 'no real disagreement' as the main finding, though it does cite the relevant facts; the second reply's suggestion correctly targets revealing their shared five-year rule via the sister example.
GPT-6.1 Sol: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies their shared five-year criterion but presents defaults, prevalence, and risk emphasis as remaining substantive disagreements, while the second reply directly targets their underlying compatibility.
Claude Sonnet 5 · run 1 Did not find the cruxSuggestion not aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply treats the four listed points as genuine substantive disagreements rather than recognizing that A and B actually share the same buy-if-staying-five-years/rent-otherwise principle, though it does mention the underlying facts (closing costs, five-year runway, flexibility); the second reply correctly zeroes in on the certainty-threshold question as the real (non-values) sticking point, aligning with the key's crux.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: no.
The first reply includes relevant facts but invents a substantive threshold disagreement, and the second proposes negotiating that threshold instead of recognizing their already-compatible conditional advice.
Claude Sonnet 5 · run 2 Did not find the cruxSuggestion not aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply treats the mutual mischaracterization ('rent by default' vs 'buy by default') as the real, substantive, unresolved disagreement rather than recognizing their shared five-year rule, though it does mention the relevant facts; the second reply, by contrast, explicitly identifies the shared time-horizon principle and aims its suggestion squarely at that crux.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: no.
The replies mention the shared time-horizon reasoning but replace their compatible conditional advice with an unsupported dispute about how much certainty buying requires.
Claude Sonnet 5 · run 3 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply frames the disagreement as four distinct points (default advice, uncertainty, overgeneralization, framing) and only appends the real agreement as an afterthought rather than naming it as the main disagreement, so it's buried rather than foregrounded; the second reply correctly zeroes in on the shared 5-year/numbers criterion as the key to resolution.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply acknowledges their shared criteria but still invents a substantive disagreement, whereas the second usefully directs them toward recognizing their compatible conditional advice.
Claude Haiku 4.5 · run 1 Did not find the cruxSuggestion not aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply lists several differences (risk tolerance, threshold, scope, error-preference) without ever stating that A and B actually share the same buy-if-staying/rent-if-not rule, framing the dispute as caution-vs-individualization much like the pair's own mutual mischaracterization; the second reply's suggestion to define a shared predictability threshold does converge on the real crux.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: no.
The replies invent an unresolved difference over predictability despite both speakers accepting an approximately five-year expected stay as the relevant starting point.
Claude Haiku 4.5 · run 2 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply lists four separate 'disagreements' (treating the 5-year threshold, predictability, risk, and application as conflicts) rather than recognizing they actually agree, though it does mention the key facts like the 5-year threshold and closing costs; the second reply's checklist starts with the 5+ year staying question, which matches the actual crux.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply presents compatible positions as disagreements, while the second targets their shared conditional approach by proposing a checklist beginning with an expected stay of at least five years.
Claude Haiku 4.5 · run 3 Did not find the cruxSuggestion not aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: no.
The reply frames the whole exchange as real disagreements over thresholds and predictability rather than recognizing they already agree on the 'buy if staying ~5+ years, else rent' rule, and the second reply's bridge is a generic 'it depends on circumstances' rather than the specific 5-year agreement.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply invents differences despite mentioning their compatible time horizons, while the second offers an on-target bridge by emphasizing their shared circumstance-dependent advice.
GPT-6.1 Sol · run 1 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: yes.
The reply notes their positions 'largely overlap' but still frames the disagreement as a difference in caution/breadth rather than stating they share the same five-year rule, so it doesn't fully name the no-real-disagreement crux, though it does mention the relevant facts and the second reply's suggestion directly probes the five-year threshold.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply states both compatible conditional positions but invents a remaining disagreement, while the second directly tests their agreement on a settled buyer.
GPT-6.1 Sol · run 2 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: yes.
The reply frames this as a real dispute over how much weight to give possible life changes, rather than recognizing their positions are fully compatible, though it does mention the key facts and its follow-up suggestion correctly targets the five-year threshold crux.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply includes their shared conditions but invents a substantive difference in caution, while the second targets their already-compatible five-year standard.
GPT-6.1 Sol · run 3 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply treats 'how much weight to give life changes' as a genuine residual disagreement rather than recognizing their views are actually identical, though it does mention the underlying cost/duration/flexibility facts; the second reply's suggested rule matches the key's crux-focused bridge.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply repeats their perceived disagreement over caution despite mentioning their compatible five-year criteria, while the second proposes a decision rule that targets their underlying agreement.
Disagreement, then agreement
"Answer in two parts: 1. Where do they disagree? 2. What do they agree on?"
Claude Opus 5.5 · run 1 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply ultimately concludes they share the same underlying five-year decision rule and only differ in which mistake they worry about, matching the key's crux, and it cites the concrete supporting statements (the sister's six-year plan, A's 'crystal ball' line, the five-year threshold); the second reply's suggestion to state the shared five-year test explicitly is squarely aimed at that same crux.
GPT-6.1 Sol: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply explicitly identifies their shared decision rule but frames default advice and emphasis as their real disagreement, while the second reply directly proposes stating the shared rule.
Claude Opus 5.5 · run 2 Named the crux as one of several disagreementsSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply frames 'default advice' as the real disagreement and only mentions the compatibility insight as a buried aside, rather than identifying it as the main crux, though it does cite the relevant facts; the second reply correctly targets the crux by having A apply the shared five-year rule to the sister.
GPT-6.1 Sol: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply recognizes their compatible five-year criteria but subordinates that insight to purported disagreements, while the second reply directly helps them recognize their shared rule.
Claude Opus 5.5 · run 3 Singled out the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply ultimately concludes they 'largely share the same decision rule,' matching the key's no-real-disagreement crux, and cites the relevant facts (2-5% range, five-year horizon, sister's six-year stay); the second reply's suggestion to apply A's own rule to the sister directly targets that shared crux.
GPT-6.1 Sol: Singled out the crux. Facts included: yes. Suggestion aimed at the crux: yes.
Both replies recognize the shared decision rule, and applying it to the sister targets the misunderstanding, but the claimed remaining disagreement about population proportions is unsupported.
Claude Sonnet 5 · run 1 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply frames a 'core dispute' as if real, only folding the compatible-views insight into the agreement section rather than naming it as the actual crux, though it does list the needed facts; the second reply correctly targets the stay-5-years rule as the bridge.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply identifies the shared conditions but foregrounds their apparent opposing advice rather than their compatibility, while the second reply proposes the appropriate conditional decision rule.
Claude Sonnet 5 · run 2 Did not find the cruxSuggestion not aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply treats the disagreement as a real difference in scope/weighting rather than identifying that both hold the same 'buy if staying ~5+ years, else rent' rule, though it does list the crux facts under 'agreement'; the second reply's suggestion to separate general rule from specific case correctly targets that same crux.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: no.
The replies recognize shared financial reasoning but replace the compatible five-year condition with an unsupported general-rule-versus-exception disagreement.
Claude Sonnet 5 · run 3 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The reply treats the 'default advice for the age group' framing as a genuine unresolved disagreement rather than recognizing both hold the same stay-5-years rule, though it does list the relevant facts and its bridge suggestion correctly zeroes in on that shared criterion.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply presents competing default advice as the core disagreement despite identifying their shared conditions, while the second appropriately proposes making those shared conditions explicit.
Claude Haiku 4.5 · run 1 Did not find the cruxSuggestion not aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply treats the surface disagreement (predictability vs. caution) as real rather than recognizing their shared 5-year rule, though it does cite the relevant facts (time horizon, costs, flexibility); the second reply's checklist suggestion correctly converges on the same 5+ year criterion as the key's crux.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: no. Suggestion aimed at the crux: no.
The replies invent a disagreement about sufficient predictability instead of recognizing the shared conditional advice to consider buying for an expected stay of about five years or more and rent otherwise.
Claude Haiku 4.5 · run 2 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: yes.
The first reply lists four separate 'disagreements' (threshold, predictability, risk, default) instead of naming the underlying compatibility, though it touches the crux facts in its agreement section; the second reply's suggestion to treat the sister as a legitimate exception to A's rule effectively restates the shared 'buy if staying ~5 years, else rent' principle, so it hits the crux.
GPT-6.1 Sol: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply invents substantive differences despite mentioning the compatible time horizons, while the second targets their shared conditional reasoning but misleadingly frames the sister as an exception.
Claude Haiku 4.5 · run 3 Did not find the cruxSuggestion not aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Named the crux as one of several disagreements. Facts included: yes. Suggestion aimed at the crux: no.
The reply lists multiple seeming disagreements (including the five-year threshold, which is actually the shared crux) without recognizing that A and B actually agree, so it never identifies the core compatibility; the second reply's suggestion about defining 'predictability' doesn't target the shared five-year rule as the key does.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: no.
The first reply reproduces their perceived rent-versus-buy opposition despite mentioning their compatible time horizons, and the second proposes resolving a certainty requirement that A explicitly disclaims.
GPT-6.1 Sol · run 1 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a disagreement that isn't there). Facts included: yes. Suggestion aimed at the crux: yes.
The reply frames an ongoing disagreement about 'how much stability is enough' rather than recognizing that both already agree on the same five-year rule, even though it mentions the underlying facts; the second reply's suggestion to test agreement on the sister's case does target the real crux.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply includes the shared five-year reasoning but still presents their competing characterizations as a substantive disagreement; the second could expose their compatible advice by applying it to B’s sister.
GPT-6.1 Sol · run 2 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: a real but secondary point). Facts included: yes. Suggestion aimed at the crux: yes.
The reply frames A and B as holding genuinely different default positions (rent-first vs buy-if-stable) rather than recognizing they share the same five-year rule, though it gathers the relevant facts and the second reply's suggestion does target that shared rule.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply frames their main disagreement as competing default advice rather than explicitly identifying their compatible views, but includes the shared criteria, and the second reply targets those criteria directly.
GPT-6.1 Sol · run 3 Did not find the cruxSuggestion aimed at the crux
First answer
Answer to "What one thing could most help them find agreement?"
Judges
Claude Sonnet 5: Did not find the crux (named instead: something else). Facts included: yes. Suggestion aimed at the crux: yes.
The reply restates the crux content (5-year threshold, stability, costs) but frames it as a genuine disagreement over 'how much stability is enough' rather than recognizing it as the same underlying rule both hold, so it misses that there's no real disagreement even though it surfaces the key facts.
GPT-6.1 Sol: Did not find the crux (named instead: the people's own description of their disagreement). Facts included: yes. Suggestion aimed at the crux: yes.
The first reply presents conflicting default advice as the main disagreement despite including their compatible five-year conditions, while the second proposes making that shared rule explicit.