Series 2 · Medical malpractice

The Spinal-Infection Intake

Q67Four 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 the firm to accept, retain both experts, obtain certificates within 20 days, and file at least 30 days before limitations expires. They reach the same liability conclusions and identical economic results, including the firm’s $185,333 expected net return. The additional investigations and controls proposed by Answer B do not produce a concrete, record-supported difference in Lena’s outcome.

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 67: The Spinal-Infection Intake

Your role

You are evaluating a medical-malpractice case for Lena Orr, who suffered permanent leg weakness after an emergency-department delay. Decide whether the firm should accept or decline the matter using the supplied liability assessment, verdict distribution, cost schedule, lien, contingency terms, and filing deadline.

Governing law

Assume the following rules apply:

  1. Medical malpractice requires duty, breach of the professional standard of care, factual and proximate causation, and damages, proved through qualified expert testimony unless the matter is within ordinary knowledge.

  2. Causation is satisfied when negligent delay more likely than not caused the permanent injury. A greater-than-50-percent probability that timely treatment would have avoided the injury is sufficient; a mere possibility is not.

  3. A complaint must be filed within two years after the injury. A supporting expert certificate must accompany the complaint. The court cannot extend either requirement for ordinary law-office delay.

  4. Recoverable damages include past and future medical expense, lost earnings, and noneconomic loss. The supplied verdict amounts already account for applicable damages limits and collectability.

  5. The hospital's lien is paid only from a recovery. It does not increase the defendant's liability and is deducted from the client's share.

  6. Under the proposed contingency agreement, case costs are reimbursed first from any recovery. The attorney fee is one-third of the amount remaining after cost reimbursement. The lien is then paid from the client's remainder.

  7. If there is no recovery, the firm bears the litigation costs and charges Lena no fee or cost reimbursement.

  8. For intake purposes, use the supplied probability of plaintiff success and the supplied conditional verdict distribution. Do not invent settlement odds or adjust the medical panel's numbers.

  9. The firm's written intake policy accepts a contingent case only if expected net fee after expected unreimbursed costs is at least $175,000 and the case can be filed with support from both required experts at least 30 days before limitations expires.

Facts

Lena, age 46, went to North Vale Hospital with fever, severe back pain, and progressive leg numbness. An MRI report timestamped 11:18 p.m. identified a probable spinal epidural abscess and recommended immediate surgical consultation. The emergency physician electronically acknowledged the report but did not call surgery until 7:30 a.m. Lena underwent decompression at 10:10 a.m. and now has permanent weakness requiring a brace and reduced work hours.

A board-certified emergency physician has signed a preliminary opinion that the failure to obtain an immediate consultation breached the standard of care. A neurosurgeon has signed a preliminary opinion that decompression before 2:00 a.m. would have given Lena a 60 percent probability of avoiding permanent neurological deficit. The defense is expected to argue that sepsis and the abscess location would have produced the deficit despite earlier surgery.

The firm's medical screening panel assigns a 55 percent probability of plaintiff success at trial. Conditional on a plaintiff verdict, it supplies this distribution:

  • 60 percent probability of a $1,200,000 verdict.
  • 30 percent probability of a $2,400,000 verdict.
  • 10 percent probability of a $4,000,000 verdict.

Projected litigation costs are $240,000 and are incurred whether the firm wins or loses. Lena has a $160,000 hospital lien that is valid and currently nonnegotiable. All verdicts are collectible.

Limitations expires in 110 days. The two preliminary experts will convert their opinions to signed certificates within 20 days if retained. No other firm has a claim to fees.

Assignment

Analyze:

  • Breach and causation under the supplied greater-than-50-percent rule.
  • Whether the preliminary expert record supports filing.
  • The conditional expected verdict.
  • Lena's net recovery in each verdict branch after costs, fee, and lien.
  • Lena's overall expected net recovery.
  • The firm's expected fee and expected unreimbursed-cost loss.
  • The firm's expected net return under its intake policy.
  • The filing and certificate timetable.
  • Whether to accept or decline, with the first concrete steps if accepted.


Read the sealed key

Q67 key (Spinal-Infection Intake)

  1. The signed preliminary opinions support breach and the supplied causation threshold: the neurosurgeon states a 60 percent probability that timely decompression would have avoided permanent deficit, exceeding 50 percent. The sepsis defense creates trial risk already reflected in the 55 percent success probability. Missed: a sufficient causation opinion is mislabeled a mere lost possibility or treated as certainty.
  2. Conditional expected verdict is 60 percent of $1,200,000 plus 30 percent of $2,400,000 plus 10 percent of $4,000,000, equaling $1,840,000. Missed: the 55 percent liability probability is applied twice or omitted.
  3. At $1.2 million: reimburse $240,000 costs, leaving $960,000; fee is $320,000; Lena receives $640,000 before lien and $480,000 after the $160,000 lien. At $2.4 million: Lena nets $1,280,000. At $4 million: Lena nets approximately $2,346,667. Missed: fee is calculated before cost reimbursement or the lien is charged to gross recovery.
  4. Conditional expected client net is 60 percent of $480,000 plus 30 percent of $1,280,000 plus 10 percent of $2,346,667, approximately $906,667. Multiply by 55 percent success probability for overall expected client net of approximately $498,667. Missed: loss branches or the conditional distribution are omitted.
  5. Conditional expected fee is one-third of the $1,600,000 remaining after subtracting $240,000 in costs from the $1,840,000 conditional expected verdict, or approximately $533,333. Expected fee is 55 percent of that, approximately $293,333. Expected unreimbursed cost loss is 45 percent of $240,000, or $108,000. Expected net return is approximately $185,333. Missed: reimbursed costs are counted as profit or losing-case costs disappear.
  6. The expected net return exceeds the firm's $175,000 threshold by approximately $10,333. The client economics are also materially positive on the supplied inputs. Missed: the case is accepted or declined without applying the firm's own criterion.
  7. Accept the case, retain both experts immediately, obtain final certificates within 20 days, complete investigation and pleadings, and file no later than day 80 so the complaint is supported at least 30 days before the day-110 deadline. Missed: a financially qualifying case is lost to an avoidable certificate or limitations failure.
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 the firm to accept, retain both experts, obtain certificates within 20 days, and file at least 30 days before limitations expires. They reach the same liability conclusions and identical economic results, including the firm’s $185,333 expected net return. The additional investigations and controls proposed by Answer B do not produce a concrete, record-supported difference in Lena’s outcome.

[B] rejected: the acknowledgment is machine-generated and forecloses the usual notice defense — record establishes electronic acknowledgment but not how it was generated or that all notice defenses are foreclosed.
[B] rejected: costs may exceed the supplied projection and require a $250,000 cap — record supplies fixed projected costs of $240,000 and no basis for an overrun.
[B] rejected: metadata faces a routine purge cycle — record contains no retention policy or threatened purge.

Failed candidates. Pre-2:00 a.m. surgical-feasibility checkpoint — concrete consequence failed because the record does not establish that timely surgery was infeasible or what the investigation would show.
Failed candidates. Immediate evidence-preservation letter — concrete consequence failed because no evidence loss or threatened destruction is established.
Failed candidates. Cost cap and sensitivity controls — different conduct failed because supplied costs remain $240,000, below the proposed cap.
Failed candidates. Day 35–40 versus Day 75 filing target — concrete consequence failed because both dates permit filing with certificates before the Day-80 policy deadline.
Failed candidates. Written disclosure of branch recoveries — concrete consequence failed because no different client decision or financial result is demonstrated.
Failed candidates. Characterizing the acknowledgment defense as foreclosed — record support failed because electronic acknowledgment does not establish the additional assertions.

Hard stop. It cannot be completed with a concrete, record-supported consequence.
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 the firm to accept, retain both experts, obtain certificates within 20 days, and file at least 30 days before limitations expires. They reach the same liability conclusions and identical economic results, including the firm’s $185,333 expected net return.Judge record
Qwen 3.8 27B vs DeepSeek V4-Flash-0731Functional tieBoth answers support breach and causation, calculate the same recoveries and expected net return, conclude that the $175,000 threshold is met, and direct the firm to accept, retain both experts, obtain certificates, and file before Day 80.Judge record
Qwen 3.8 27B vs Qwen 3.5 27BFunctional tieBoth readers would accept the case, retain both experts immediately, obtain certificates within 20 days, and file no later than Day 80. Both correctly determine that liability has preliminary expert support, Lena’s expected net recovery is approximately $498,667, and the firm’s $185,333 expected net return…Judge record
DeepSeek V4-Flash-0731 vs Claude Opus 5Functional tieBoth answers direct the firm to accept, retain both experts, obtain certificates, and file safely before day 80. They reach the same liability assessment, recoveries, expected $185,333 firm return, and materially safe filing path; Answer A’s additional cautions do not establish a record-supported different…Judge record
DeepSeek V4-Flash-0731 vs Qwen 3.5 27BFunctional tieBoth answers recommend acceptance, calculate the same recoveries and $185,333 expected net return, and direct immediate expert retention followed by certificate-supported filing before day 80. Both therefore place Lena and the firm on the same materially correct, safe legal, financial, and procedural path.Judge record
Qwen 3.5 27B vs Claude Opus 5Functional tieBoth answers direct the firm to accept, retain both experts immediately, obtain the necessary records, secure certificates by Day 20, and file before the Day-80 policy deadline. They calculate the same recoveries and $185,333 expected net return.Judge record
Rejected-point diagnostic

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

Qwen 3.8 27B0
DeepSeek V4-Flash-07310
Claude Opus 57
Qwen 3.5 27B3

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

Available reasoning traces