Series 2 · Real estate and environment

The Dry-Cleaner Parcel

Q40Four modelsSix blind pairingsMaterial-outcome scoring

Why this result mattered

Functional tie

The principal comparison placed Qwen 3.8 and Claude under concealed A/B labels.

Both answers direct Brindle to obtain Phase II results before closing, preserve innocent-purchaser protection, reject the $500,000 escrow and final-judgment condition on the present record, and require an escrow of $2,118,000 unless testing supports a different supplied branch. Both also recommend substantially equivalent contractual protections and restructuring while recognizing that current-owner liability remains.

Benchmark materials

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 40: The Dry-Cleaner Parcel

Your role

You represent Brindle Foods in a proposed acquisition of assets and an industrial parcel from Harthill Processing in the fictional State of Corven. The parcel may contain solvent contamination from a former dry-cleaning operation. Brindle wants to close in twelve days and asks whether a $500,000 escrow is enough.

Governing law

Assume the following Corven rules apply:

  1. An asset purchaser ordinarily does not assume the seller's general liabilities unless it expressly assumes them, the transaction is a de facto merger, the purchaser is a mere continuation, or the structure is used to evade liabilities.

  2. De facto merger and mere continuation consider continuity of ownership, management, employees, business, name, assets, dissolution of the seller, and whether adequate consideration remains for creditors. No single label controls.

  3. A current owner of contaminated property may be directly liable for investigation and cleanup regardless of whether it caused the release.

  4. A purchaser may preserve an innocent-purchaser defense only by conducting all appropriate pre-closing inquiry, making no prohibited affiliation with the liable party, exercising reasonable care after purchase, cooperating with regulators, and complying with land-use restrictions.

  5. A Phase I review identifying a recognized condition ordinarily requires targeted Phase II sampling before closing when reasonably available. Closing without available testing may defeat all-appropriate-inquiry protection.

  6. A seller indemnity, escrow, or price reduction allocates cost between the parties but does not bar the regulator from proceeding against the current owner.

  7. For this transaction, a prudent environmental escrow equals the supplied expected remediation cost, plus a 20 percent contingency, plus $150,000 for agency oversight and legal administration. Use only the supplied probabilities and costs.

  8. The escrow should survive long enough to cover investigation and remedy selection, include direct-payment rights, and not require a final judgment before release for approved environmental costs.

  9. Counsel should condition closing on missing testing when the result could materially change liability, price, financing, or operational feasibility.

Facts

Harthill operates a frozen-food plant on a parcel that housed a dry cleaner from 1978 to 1994. A Phase I report completed last week identifies the former dry cleaner and an abandoned floor drain as recognized environmental conditions. No Phase II soil or groundwater sampling has been performed.

A consultant gives these supplied preliminary branches for escrow analysis:

  • 65 percent probability that contamination is limited to soil, with a direct remediation cost of $800,000.
  • 35 percent probability that solvents reached groundwater, with a direct remediation cost of $3,200,000.

The probabilities are mutually exclusive and sum to 100 percent. The stated costs include investigation, treatment, and monitoring but exclude the rule 7 contingency and the separate $150,000 oversight and legal amount.

Brindle proposes an asset purchase. It will buy the parcel, equipment, inventory, recipes, customer contracts, and Harthill trade name; retain 85 percent of employees; keep three of four senior managers; and continue the same production. Harthill's owners will receive cash and dissolve Harthill within 30 days. No Harthill owner will receive Brindle equity. The proposed price leaves Harthill with $4 million after known debts, but potential environmental claims are not reserved.

The draft agreement excludes environmental liabilities in the assumption clause. Harthill offers a five-year indemnity backed by a $500,000 escrow. The indemnity requires Brindle to obtain a final court judgment before drawing. Harthill refuses an escrow above $500,000 unless testing confirms groundwater contamination.

The lender will finance the acquisition only if Brindle presents a defensible contamination plan. Targeted Phase II sampling can begin tomorrow and produce preliminary results in nine days, before the scheduled closing, at a cost of $48,000. The supplied record does not reveal whether contamination exists, its extent, or whether groundwater is affected.

Assignment

Analyze:

  • General successor-liability risk under the asset structure and continuity facts.
  • Direct owner liability for the parcel regardless of contractual assumption.
  • The innocent-purchaser requirements and effect of closing without available Phase II testing.
  • The exact expected direct remediation cost under the supplied branches.
  • The exact escrow amount under rule 7.
  • Why the proposed $500,000 escrow and final-judgment condition are or are not adequate.
  • Contract terms needed for indemnity, escrow access, cooperation, cleanup control, land-use obligations, and survival.
  • Transaction restructuring that could reduce general successor risk without pretending environmental owner liability disappears.
  • Whether to close on schedule, delay, or condition closing on Phase II results, with a concrete recommendation tied to the fact not yet known.


Read the sealed key

Q40 key (Dry-Cleaner Parcel)

  1. The asset label helps, and no ownership continuity exists, but same name, 85 percent workforce, management, business, parcel, and seller dissolution create material de facto-merger or continuation risk. Retaining adequate seller assets helps but does not eliminate it. Missed: general successor exposure is treated as impossible.
  2. Brindle becomes directly exposed as current owner regardless of assumption language. Contract allocation does not bind the regulator. Missed: environmental liability is mistaken for a negotiable definition only.
  3. Available Phase II testing is part of all appropriate inquiry after the recognized conditions. Closing without it risks the innocent-purchaser defense and lender approval. Missed: a twelve-day schedule destroys a statutory defense.
  4. Expected direct remediation cost is 0.65 x $800,000 + 0.35 x $3,200,000 = $1,640,000. Missed: escrow begins from the wrong expected loss.
  5. Rule 7 escrow is $1,640,000 x 1.20 + $150,000 = $2,118,000. Missed: the $500,000 proposal leaves more than $1.6 million of the prescribed protection unfunded.
  6. The final-judgment draw condition is unacceptable because cleanup costs arise before judgment. Require direct draw for approved investigation, agency, and remediation costs, long survival, replenishment, cooperation, access, and credit support. Missed: an indemnity exists on paper while Brindle funds the cleanup.
  7. Reduce general successor risk by limiting name and management continuity, preserving a funded seller, documenting fair consideration, and avoiding liability-evasion structure. None removes owner liability. Missed: restructuring is oversold as environmental immunity.
  8. Spend $48,000 and condition closing on Phase II results, lender acceptance, and a revised price or escrow. If forced to close before final results, require at least the $2.118 million escrow and robust rights, but the defensible recommendation is delay or condition the closing for nine days. Missed: the acquisition closes before the single fact most likely to change price and liability is known.
Blind evaluation record

Direct judge report

The report below is preserved from the Qwen 3.8 versus Claude verdict record.

Read the preserved judge report
TIE, FUNCTIONALLY EQUIVALENT.

Basis. Both answers direct Brindle to obtain Phase II results before closing, preserve innocent-purchaser protection, reject the $500,000 escrow and final-judgment condition on the present record, and require an escrow of $2,118,000 unless testing supports a different supplied branch. Both also recommend substantially equivalent contractual protections and restructuring while recognizing that current-owner liability remains.

[B] rejected: $500,000 escrow if testing shows no contamination above applicable standards — record supplies only two mutually exclusive remediation branches and no zero-contamination branch.
[B] rejected: Phase II scope including temporary well clusters and soil-vapor screening for $48,000 — record lacks the consultant’s scope and cost allocation for those components.
[B] rejected: closing without Phase II “forfeits” innocent-purchaser protection — governing rule says it may defeat protection, not that forfeiture is automatic.

Scheduled closing versus short extension — concrete consequence failed; the record shows preliminary results arrive three days before closing but does not establish that review, lender approval, and renegotiation cannot occur in that period.
Zero-contamination $500,000 tier — no-safe-neutralization element failed; ordinary verification rejects the tier against the supplied exhaustive branches, leaving B’s $1,110,000, $3,990,000, and $2,118,000 tiers.
“Forfeits” versus “may defeat” the defense — different-conduct element failed; both answers require pre-closing testing.
Specific sampling design — record-support element failed.
SPE characterization and other restructuring details — different-conduct element failed; both recommend separation only as risk reduction and expressly preserve owner-liability exposure.
Phase II cost allocation wording — concrete-consequence element failed; both contemplate a transactional allocation or purchase-price credit rather than allowing it to affect the environmental decision.

Hard stop. The sentence cannot be completed with a concrete, record-supported consequence because both answers place Brindle on the same materially safe transaction path.
Complete comparison record

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
PairingResultWhy it matteredRecord
Qwen 3.8 27B vs Claude Opus 5Functional tieBoth answers direct Brindle to obtain Phase II results before closing, preserve innocent-purchaser protection, reject the $500,000 escrow and final-judgment condition on the present record, and require an escrow of $2,118,000 unless testing supports a different supplied branch.Judge record
Qwen 3.8 27B vs DeepSeek V4-Flash-0731Functional tieBoth answers direct Brindle to complete and review Phase II testing before closing, require the Rule 7 escrow of $2,118,000 or the applicable confirmed-branch amount, eliminate the final-judgment draw condition, strengthen environmental protections, and refuse to close if Harthill will not provide adequate…Judge record
Qwen 3.8 27B vs Qwen 3.5 27BFunctional tieBoth answers direct Brindle not to close on the current terms, to complete Phase II before closing, and to condition any closing on lender approval, adequate security, and revised environmental provisions.Judge record
DeepSeek V4-Flash-0731 vs Claude Opus 5Functional tieBoth answers direct Brindle to obtain and review Phase II results before closing, recognize direct owner and meaningful successor-liability exposure, calculate the current Rule 7 escrow at $2,118,000, reject the $500,000 escrow and final-judgment condition, and require materially equivalent contractual…Judge record
DeepSeek V4-Flash-0731 vs Qwen 3.5 27BFunctional tieBoth answers direct Brindle to complete Phase II before closing, reject the $500,000 escrow and final-judgment condition, require a current Rule 7 escrow of $2,118,000 with direct-payment and adequate-survival terms, and recognize that contractual structuring cannot eliminate current-owner liability.Judge record
Qwen 3.5 27B vs Claude Opus 5Functional tieBoth answers place Brindle on the same material path: obtain Phase II results before closing, preserve the innocent-purchaser defense, reject the $500,000 final-judgment escrow, and require the rule 7 amount of $2,118,000 with accessible, adequately surviving security.Judge record
Rejected-point diagnostic

Judge-attributed rejected points for this matter across all six pairings:

Qwen 3.8 27B1
DeepSeek V4-Flash-07311
Claude Opus 511
Qwen 3.5 27B10

This is a review-burden diagnostic, not a universal hallucination measure.

Available reasoning traces