Why this result mattered
Functional tie
The principal comparison placed Qwen 3.8 and Claude under concealed A/B labels.
Both answers place Nora on the same material path: accept enforcement of the property and business provisions, demand the vested $150,000 payment, and seek only the maintenance necessary to avoid public-assistance eligibility. Both correctly reject Conclusions 1 and 2 while preserving Conclusions 3 through 5; no demonstrated difference changes Nora’s likely relief or negotiating position.
Fast audit
Open the underlying record
These links open all four answers, the principal blind judgment, original prompt, and sealed key.
Prompt and sealed key
The key is an audit reference. It was not shown to the contestant systems and did not determine the comparative verdict.
Read the original matter prompt
Question 31: The Prenup Memo Audit
Your role
You represent Nora Pell in the fictional State of Westmere. Nora is reviewing a predecessor lawyer's memorandum about a prenuptial agreement before deciding whether to negotiate a separation. Audit the memorandum under the supplied rules without rewriting conclusions that are already correct.
Governing law
Assume the following Westmere rules apply:
A premarital agreement is enforceable when it was executed voluntarily, after fair and reasonable financial disclosure or a valid written waiver, and was not unconscionable when executed.
Independent counsel is relevant to voluntariness but is not mandatory. A represented party may waive separate counsel after a meaningful opportunity to obtain it and a clear explanation that the other party's lawyer does not represent that party.
No fixed number of days before marriage is required. Timing, pressure, access to the draft, threatened cancellation, sophistication, and opportunity for advice are considered together.
Disclosure is fair and reasonable when it identifies the nature and approximate value of material assets and liabilities. Exact valuation is unnecessary, and later appreciation does not make an earlier reasonable estimate false.
Unconscionability is assessed at execution, not by comparing the parties' fortunes years later. A bargain is not unconscionable merely because one party's separate property later appreciates dramatically.
A maintenance waiver will not be enforced to the extent enforcement at separation would make a spouse eligible for public assistance. The court may order only the support necessary to avoid that result.
A valid severability clause preserves enforceable property provisions when a maintenance provision is limited, unless the provisions are inseparable by their text or purpose.
The party resisting enforcement bears the burden of proving involuntariness, inadequate disclosure, or unconscionability.
Facts
Nora and Daniel Pell signed a premarital agreement eighteen days before their wedding. Daniel's lawyer sent Nora the first complete draft 32 days before the wedding. The cover email stated that the lawyer represented Daniel only and urged Nora to retain separate counsel.
Nora, then a 38-year-old owner of a profitable design studio, replied:
"I understand you are not my lawyer. I do not want to spend money on another lawyer unless the document changes."
Daniel offered to pay up to $7,500 for Nora's counsel. Nora declined in a signed paragraph stating that she had a meaningful opportunity to obtain independent advice and chose not to do so. No one threatened to cancel the wedding. Nora proposed two changes, both of which Daniel accepted.
Daniel's disclosure schedule identified:
- A 22 percent interest in Quayside Systems, estimated at $1.2 million to $1.8 million.
- Retirement and brokerage accounts totaling approximately $610,000.
- A residence with $420,000 in equity.
- Debts of approximately $190,000.
A contemporaneous independent valuation placed the Quayside interest at $2.1 million. Daniel did not attach that report, but the agreement stated that private-company values were estimates. Nora disclosed her design studio, worth approximately $900,000, and investments of $430,000.
The agreement provides that each party keeps separate property and appreciation, waives maintenance, and receives no interest in the other's business. It gives Nora a fixed $150,000 payment after ten years of marriage. It contains a broad severability clause.
Twelve years later, Quayside is worth far more, making Daniel's interest approximately $38 million. Nora's studio failed during a regional disaster. Nora now has a disabling neurological condition and limited income. Without some maintenance, she would qualify for public assistance. Daniel does not contend that the $150,000 payment or separate-property provisions are textually dependent on the maintenance waiver.
The predecessor memorandum states:
Conclusion 1. The entire agreement is automatically invalid because Nora did not have independent counsel.
Conclusion 2. Even if execution was voluntary, the agreement is unconscionable because Daniel's company interest is now worth about $38 million while Nora is disabled.
Conclusion 3. The original Quayside disclosure was probably adequate because it identified the asset and a reasonable approximate range; later appreciation does not retroactively falsify it.
Conclusion 4. The court may order maintenance only to the extent needed to keep Nora off public assistance, while enforcing the separate-property and fixed-payment provisions under the severability clause.
Conclusion 5. The eighteen-day signing interval does not itself establish duress because Nora received the full draft earlier, proposed changes, faced no cancellation threat, and signed a counsel waiver.
Assignment
Review and correct the predecessor memorandum by:
- Identifying the two conclusions that misapply the supplied enforceability rules.
- Explaining the precise rule error in each.
- Leaving the legally correct conclusions intact rather than manufacturing additional faults.
- Assessing voluntariness, disclosure, execution-time unconscionability, maintenance, and severability under the supplied facts.
- Stating the most likely enforceable and unenforceable portions.
- Advising Nora how the corrected analysis should affect separation negotiations and what relief she should seek.
Read the sealed key
Q31 key (Prenup Memo Audit)
- Conclusion 1 is wrong. Independent counsel is relevant but not mandatory, and Nora received a meaningful opportunity, a payment offer, a clear nonrepresentation warning, and signed waiver. Missed: negotiations begin from a nonexistent automatic-invalidity rule.
- Conclusion 2 is wrong. Unconscionability is assessed when executed, not from the present $38 million disparity or Nora's later disability. Missed: later appreciation is treated as retroactive execution misconduct.
- Conclusion 3 should remain: the schedule identified the Quayside interest and a reasonable approximate range; the $2.1 million contemporaneous valuation does not make the $1.2-to-$1.8 million estimate materially undisclosed on these rules. Missed: a correct disclosure analysis is needlessly weakened.
- Conclusion 4 should remain: maintenance may be ordered only to prevent public-assistance eligibility, while severability preserves the property and $150,000 provisions. Missed: Nora either waives available support or demands wholesale invalidation unlikely to succeed.
- Conclusion 5 should remain: the timing record, earlier delivery, negotiated changes, no cancellation threat, and counsel opportunity support voluntariness. Missed: the audit manufactures a third error contrary to the record.
- The likely destination is enforcement of the separate-property, appreciation, business, and fixed-payment provisions, with a limited maintenance order. Advise Nora to negotiate the support needed to avoid public assistance and payment mechanics, not stake the separation on voiding the whole agreement. Missed: settlement leverage is spent on losing theories.
Direct judge report
The report below is preserved from the Qwen 3.8 versus Claude verdict record.
Read the preserved judge report
Basis. Both answers place Nora on the same material path: accept enforcement of the property and business provisions, demand the vested $150,000 payment, and seek only the maintenance necessary to avoid public-assistance eligibility. Both correctly reject Conclusions 1 and 2 while preserving Conclusions 3 through 5; no demonstrated difference changes Nora’s likely relief or negotiating position.
[A] rejected: a Rule 6 order is inherently revisitable — record lacks rules governing modification or finality.
[A] rejected: a permanent negotiated release may govern despite later need — record lacks rules governing such releases.
[B] rejected: Daniel’s current wealth is highly relevant to the Rule 6 support calculation — supplied rule limits relief by Nora’s public-assistance need and provides no wealth-based calculation rule.
[B] rejected: litigation creates reputational costs for Daniel — record lacks supporting facts.
Failed candidates. Treatment of the $150,000 as an available resource when calculating maintenance — different conduct failed; both require assessment of Nora’s assets and public-assistance eligibility.
Failed candidates. Additional settlement protections proposed by Answer A — concrete consequence failed; the record does not establish their availability or acceptance.
Failed candidates. Investigation of the $2.1 million valuation — likelihood failed; both identify the discrepancy but conclude disclosure was probably adequate.
Failed candidates. Unsupported modification, release, wealth-calculation, and reputational assertions — record support failed.
Hard stop. The required sentence cannot be completed with a concrete, record-supported consequence.
All six pairings
Every pair of the four model answers was judged independently under the same evaluation instrument.
Open the six head-to-head results
| Pairing | Result | Why it mattered | Record |
|---|---|---|---|
| Qwen 3.8 27B vs Claude Opus 5 | Functional tie | Both answers place Nora on the same material path: accept enforcement of the property and business provisions, demand the vested $150,000 payment, and seek only the maintenance necessary to avoid public-assistance eligibility. | Judge record |
| Qwen 3.8 27B vs DeepSeek V4-Flash-0731 | Functional tie | Both answers correct Conclusions 1 and 2, preserve Conclusions 3 through 5, and place Nora on the same material path: enforce the $150,000 payment, seek only maintenance necessary to avoid public assistance, and do not challenge the separate-property or Quayside-appreciation provisions. | Judge record |
| Qwen 3.8 27B vs Qwen 3.5 27B | Functional tie | Both answers place Nora on the same material path: accept likely enforcement of the separate-property and $150,000 provisions, abandon whole-agreement challenges based on lack of counsel or later hardship, and seek maintenance only as necessary to avoid public assistance. | Judge record |
| DeepSeek V4-Flash-0731 vs Claude Opus 5 | Functional tie | Both answers correct Conclusions 1 and 2, preserve Conclusions 3 through 5, and place Nora on the same material path: enforce the property, business-appreciation, and $150,000 provisions while seeking only the maintenance necessary to avoid public-assistance eligibility. | Judge record |
| DeepSeek V4-Flash-0731 vs Qwen 3.5 27B | Functional tie | Both answers put Nora on the same material path: treat the property and fixed-payment provisions as enforceable, abandon whole-agreement and later-unconscionability challenges, and seek only maintenance necessary to avoid public-assistance eligibility. | Judge record |
| Qwen 3.5 27B vs Claude Opus 5 | Functional tie | Both answers place Nora on the same material path: abandon global invalidation, treat the property and $150,000 provisions as enforceable, and seek maintenance only as necessary to avoid public-assistance eligibility. | Judge record |
Rejected-point diagnostic
Judge-attributed rejected points for this matter across all six pairings:
| Qwen 3.8 27B | 4 |
|---|---|
| DeepSeek V4-Flash-0731 | 0 |
| Claude Opus 5 | 9 |
| Qwen 3.5 27B | 6 |
This is a review-burden diagnostic, not a universal hallucination measure.