8.2 Defenses, Damages, and Vicarious Liability
Key Takeaways
- Common-law defenses include contributory negligence, comparative negligence (pure and modified 50%/51%), assumption of risk, and the last clear chance doctrine.
- Under pure comparative negligence a claimant 90% at fault still recovers 10% of damages; under a 51% modified rule, a claimant 51%+ at fault recovers nothing.
- Damages are compensatory (special economic + general non-economic) or punitive; punitive damages are uninsurable in many states.
- Vicarious liability holds one party responsible for another's acts — respondeat superior (employer/employee), agency, and family-purpose doctrine.
- Res ipsa loquitur shifts the burden of proof to the defendant when the harm could not occur without negligence and the instrumentality was in the defendant's control.
Defenses Against Negligence Claims
Even where the four elements exist, a defendant may reduce or eliminate liability with a recognized defense.
| Defense | Effect |
|---|---|
| Contributory negligence | If the claimant contributed at all, recovery is barred entirely (harsh; only a few states) |
| Comparative negligence — pure | Recovery reduced by the claimant's % of fault, even at 99% |
| Comparative negligence — modified (50% rule) | Claimant recovers only if less than 50% at fault |
| Comparative negligence — modified (51% rule) | Claimant recovers only if 50% or less (barred at 51%+) |
| Assumption of risk | Claimant knowingly accepted a known danger |
| Last clear chance | Even a negligent claimant recovers if the defendant had the last chance to avoid harm |
Trap: Pure contributory negligence (any fault bars recovery) is the minority rule. Most states use comparative negligence.
Worked Comparative-Negligence Numeric
A jury awards $100,000 in total damages and finds the claimant 30% at fault.
- Pure comparative: $100,000 × (1 − 0.30) = $70,000 recovered.
- Modified 51% rule: claimant is below 51%, so still recovers $70,000.
Now change the facts: the claimant is found 60% at fault on a $100,000 award.
- Pure comparative: $100,000 × 0.40 = $40,000 recovered.
- Modified 51% rule: claimant is 51%+ at fault → $0 recovered.
- Contributory negligence state: any claimant fault bars recovery → $0.
The same facts produce three different payouts depending on the state's negligence rule — a classic exam set-up.
Negligence Per Se
When a defendant violates a statute designed to protect a class of people (e.g., running a red light, failing to fence a pool), and that violation causes the type of harm the statute was meant to prevent, the breach element is presumed — this is negligence per se. The claimant need not separately prove the standard of care was breached; the statutory violation establishes it. This shortens the plaintiff's proof and is a frequent fact pattern paired with res ipsa loquitur.
Negligence Defenses and Categories of Damages
When sued, a defendant may raise defenses that reduce or eliminate liability:
| Defense | Effect |
|---|---|
| Contributory negligence | In a few states, any fault by the plaintiff bars all recovery |
| Comparative negligence | Recovery reduced by the plaintiff's percentage of fault (pure vs. modified) |
| Assumption of risk | Plaintiff knowingly accepted a danger |
| Last clear chance | Plaintiff recovers if defendant had the final opportunity to avoid harm |
Damages awarded fall into:
- Special (economic) compensatory - measurable: medical bills, lost wages, repair costs.
- General (non-economic) compensatory - pain and suffering, disfigurement, loss of consortium.
- Punitive (exemplary) - punish willful/malicious conduct; often uninsurable as a matter of public policy in many states.
Exam trap: Punitive damages are frequently NOT insurable by public policy, so liability policies usually pay only compensatory damages. Vicarious liability holds one party responsible for another's torts - an employer for an employee acting within the scope of employment (respondeat superior), or a vehicle owner for a permissive user. Comparative vs. contributory negligence is a classic state-law distinction tested on exams; most states use comparative systems today.
A claimant is awarded $80,000 and found 25% at fault in a PURE comparative negligence state. How much does the claimant recover?
Classifying Damages
Damages a court awards fall into three categories — know which are insurable.
- Special (compensatory – economic): measurable out-of-pocket loss — medical bills, lost wages, repair/replacement cost.
- General (compensatory – non-economic): intangible loss — pain and suffering, disfigurement, loss of consortium.
- Punitive (exemplary): awarded to punish gross or willful misconduct, beyond the actual loss.
Insurability trap: Punitive damages are uninsurable in many states on public-policy grounds — insuring punishment would defeat its deterrent purpose. Special and general (compensatory) damages are always insurable.
Liability claims that allege bodily injury normally trigger payment of both special and general damages; the policy limit caps the total the insurer pays for damages and supplementary payments are paid in addition on personal lines.
Vicarious (Imputed) Liability
Vicarious liability imposes responsibility on one party for the negligent acts of another, even though the first party did nothing wrong personally.
- Respondeat superior — “let the master answer”; an employer is liable for the negligent acts of employees committed within the scope of employment.
- Agency — a principal is liable for the acts of its agents acting within authority.
- Family-purpose doctrine — the head of a household is liable for the negligent driving of family members using a family vehicle.
- Dram-shop / liquor-liability laws — establishments liable for harm caused by patrons they over-served.
Res Ipsa Loquitur
“The thing speaks for itself.” When an injury could not ordinarily occur without negligence, the instrumentality was under the defendant's exclusive control, and the claimant did not contribute, the burden of proof shifts to the defendant to prove they were not negligent (e.g., a surgical sponge left inside a patient).
Joint and Several Liability
When two or more parties combine to cause a single, indivisible harm, joint and several liability lets the claimant collect the entire judgment from any one defendant, regardless of that defendant's individual share of fault. That defendant then seeks contribution from the others.
- A defendant only 10% at fault can be forced to pay 100% of a $1,000,000 award if the co-defendants are insolvent — then pursue them for reimbursement.
- Many states have adopted modified joint-and-several rules that limit a minor defendant's exposure (e.g., a defendant under 50% fault pays only its proportionate share of non-economic damages).
Subrogation tie-in: After paying, a liability insurer may subrogate against other responsible parties to recover its outlay. Subrogation prevents the insured from collecting twice and shifts the loss to the truly responsible party — a recurring exam theme that links damages, vicarious liability, and contribution.
A delivery driver, while making deliveries on the job, negligently injures a pedestrian. The injured party sues the trucking company. Which doctrine makes the EMPLOYER liable for the driver's negligence?