Lay Opinion
Lay Opinion Evidence Evidence Lay Opinion Complete Evidence List EvidenceThis topic appears in the UBE 2026 Rules Library master list under Evidence.Lay OpinionUse this entry as the rule-review checkpoint for Lay Opinion...
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Witnesses and Opinions / Lay and Expert Opinion
Evidence Lay and Expert Opinion Witnesses and Opinions Witnesses and Opinions / Lay and Expert Opinion Witnesses and Opinions Lay and Expert Opinion Witnesses and Opinions / Lay and Expert Opinion
A medical expert forms an opinion partly from hospital records, lab reports, and interviews with family members. Some...
A medical expert forms an opinion partly from hospital records, lab reports, and interviews with family members. Some family statements are hearsay, but doctors in the field reasonably rely on such histories when making...
Citations: Fed. R. Evid. 703
A plaintiff offers a fire investigator's expert opinion that a defective appliance caused a house fire. The investiga...
A plaintiff offers a fire investigator's expert opinion that a defective appliance caused a house fire. The investigator is qualified, but the defendant challenges whether the investigator used reliable methods and relia...
Citations: Fed. R. Evid. 702
At trial, a qualified engineering expert is asked for her opinion on why a crane failed. Opposing counsel objects tha...
At trial, a qualified engineering expert is asked for her opinion on why a crane failed. Opposing counsel objects that the expert cannot state an opinion until she first lists every measurement, photograph, and calculati...
Citations: Fed. R. Evid. 705
Defendant is charged in federal court with knowingly possessing fentanyl with intent to distribute. Defendant claims...
...l law." How should the court analyze the proposed testimony under the opinion rules? Discuss ultimate issues, Rule 704(b), expert helpfulness, and legal conclusions. This essay tests ultimate issue testimony and the crim...
Citations: Fed. R. Evid. 704, Fed. R. Evid. 702, Fed. R. Evid. 403
Homeowner sues BatteryCo after a home fire allegedly started in a lithium battery pack. Homeowner offers Dr. Lin, an...
...n. How should the court analyze the admissibility of Dr. Lin's expert opinion under Rule 702? Discuss qualification, sufficient facts or data, reliable principles and methods, reliable application, and helpfulness. This...
Citations: Fed. R. Evid. 702, Fed. R. Evid. 403
In a car-crash trial, a pedestrian who saw the collision from the curb testifies that the defendant's car was "going...
In a car-crash trial, a pedestrian who saw the collision from the curb testifies that the defendant's car was "going very fast, around 50 miles per hour." The pedestrian is not an accident-reconstruction expert. Defen...
Citations: Fed. R. Evid. 701
Defendant is charged with knowingly possessing counterfeit access cards. A defense psychiatrist will testify that Def...
Defendant is charged with knowingly possessing counterfeit access cards. A defense psychiatrist will testify that Defendant has a cognitive disorder that makes him unusually suggestible. The defense also wants the psy...
Citations: Fed. R. Evid. 704(b), Fed. R. Evid. 702
In a complex federal groundwater-contamination case, both sides offer hydrogeologists with sharply conflicting models...
In a complex federal groundwater-contamination case, both sides offer hydrogeologists with sharply conflicting models. After a hearing, the judge appoints Dr. Silva as a neutral expert under Rule 706 to help the jury...
Citations: Fed. R. Evid. 706, Fed. R. Evid. 403
In a complex patent-damages case, the court appoints a neutral accounting expert under Rule 706. One party asks to de...
In a complex patent-damages case, the court appoints a neutral accounting expert under Rule 706. One party asks to depose and cross-examine the expert. The other argues that court-appointed experts are neutral and the...
Citations: Fed. R. Evid. 706
In a construction-defect case, a master plumber with 25 years of field experience but no engineering degree is offere...
In a construction-defect case, a master plumber with 25 years of field experience but no engineering degree is offered to explain why a pipe-joint installation failed. The opponent argues that only a mechanical engine...
Citations: Fed. R. Evid. 702
In a negligence trial, a qualified accident-reconstruction expert will testify that the defendant's truck crossed the...
In a negligence trial, a qualified accident-reconstruction expert will testify that the defendant's truck crossed the center line and caused the collision. The defendant objects that causation is the ultimate issue fo...
Citations: Fed. R. Evid. 704(a), Fed. R. Evid. 704(b)
In a products-liability case, a factory technician who repaired the machine after the accident will testify that a wo...
...er specialized repair training. The plaintiff offers the testimony as lay opinion because the technician personally inspected the machine. Which statement is most accurate? The correct answer applies Rule 701(c)'s specia...
Citations: Fed. R. Evid. 701, Fed. R. Evid. 702
Patient sues PharmaCo, alleging that a drug caused liver failure. Patient offers Dr. Rao, a hepatologist. Dr. Rao rev...
...terviews and all details of the medical literature before stating his opinion. PharmaCo objects that the family statements are inadmissible hearsay and that the literature excerpts will confuse the jury. Patient says Rul...
Citations: Fed. R. Evid. 703, Fed. R. Evid. 705, Fed. R. Evid. 702
Plaintiff sues DeliveryCo after a van struck her bicycle in a downtown intersection. Plaintiff calls Bystander, who w...
...How should the court rule on the proposed opinion testimony? Discuss lay opinion, expert opinion, helpfulness, specialized knowledge, and any disclosure or reliability issues. This essay tests the boundary between lay o...
Citations: Fed. R. Evid. 701, Fed. R. Evid. 702, Fed. R. Evid. 403
Restaurant Owner sues Contractor for a fire that closed the restaurant for two months. Owner has operated the restaur...
...actor objects that only a retained valuation expert may give a dollar opinion. Which statement is most accurate? The correct answer applies Rule 701 to owner valuation testimony. Fed. R. Evid. 701
Citations: Fed. R. Evid. 701
Expert Opinion
...Wrongs, or ActsHabitAuthenticationBest Evidence RuleWitness CompetencyLay OpinionExpert OpinionImpeachmentRehabilitationPrior Inconsistent StatementsPrior Consistent StatementsBiasConvictionsSpecific ActsHearsayHearsay E...
Bias
...Wrongs, or ActsHabitAuthenticationBest Evidence RuleWitness CompetencyLay OpinionExpert OpinionImpeachmentRehabilitationPrior Inconsistent StatementsPrior Consistent StatementsBiasConvictionsSpecific ActsHearsayHearsay E...
Habit
...Wrongs, or ActsHabitAuthenticationBest Evidence RuleWitness CompetencyLay OpinionExpert OpinionImpeachmentRehabilitationPrior Inconsistent StatementsPrior Consistent StatementsBiasConvictionsSpecific ActsHearsayHearsay E...
Hearsay
...Wrongs, or ActsHabitAuthenticationBest Evidence RuleWitness CompetencyLay OpinionExpert OpinionImpeachmentRehabilitationPrior Inconsistent StatementsPrior Consistent StatementsBiasConvictionsSpecific ActsHearsayHearsay E...
Relevance
...Wrongs, or ActsHabitAuthenticationBest Evidence RuleWitness CompetencyLay OpinionExpert OpinionImpeachmentRehabilitationPrior Inconsistent StatementsPrior Consistent StatementsBiasConvictionsSpecific ActsHearsayHearsay E...
Privileges
...Wrongs, or ActsHabitAuthenticationBest Evidence RuleWitness CompetencyLay OpinionExpert OpinionImpeachmentRehabilitationPrior Inconsistent StatementsPrior Consistent StatementsBiasConvictionsSpecific ActsHearsayHearsay E...
Convictions
...Wrongs, or ActsHabitAuthenticationBest Evidence RuleWitness CompetencyLay OpinionExpert OpinionImpeachmentRehabilitationPrior Inconsistent StatementsPrior Consistent StatementsBiasConvictionsSpecific ActsHearsayHearsay E...