· Subject Deep Dives
The Only 4-Part Duty of Care Framework You'll Need
Negligence is half of MBE Torts. Master it not by memorizing rules, but with this simple 4-part negligence framework for law school & the bar exam.
This is Part 1 of our Complete Negligence Framework series.
Negligence is the heavyweight champion of the Multistate Bar Exam (MBE). It comprises half of the Torts questions you will face, and the concept of "Duty" is the gatekeeper. If you can’t establish a duty, the rest of your analysis collapses.
Many students get lost in the weeds of specific torts, but Torts is actually about structure. To master this subject, you don't need to memorize an infinite list of potential accidents. You need a reliable engine to process any set of facts.
This 4-part framework is that engine. It breaks down the massive concept of Negligence into manageable components: Duty, Breach, Causation, and Damages. Whether you are prepping for a cold call or strategizing for the bar, this structure is your roadmap.
For a broader look at how to organize legal analysis, you might find our guide on CRAC vs. IRAC vs. CREAC helpful. Here, we will apply that logical rigor specifically to Torts.
1. Establishing the Duty — Who Owes What to Whom?
The first question you ask in any negligence problem is: "Did the defendant owe a duty to the plaintiff?" If the answer is no, the case is over. Duty is a question of law, meaning the judge decides it, not the jury.
The Reasonable Prudent Person Standard Explained
The default setting in Torts is the Reasonable Prudent Person (RPP) standard. You measure the defendant's conduct against a hypothetical person who acts with average care, skill, and judgment.
Most-Missed MBE Nuance: The RPP standard is objective, but it incorporates the defendant's physical characteristics, not their mental shortcomings.
- Physical: If the defendant is blind, the standard is "a reasonable blind person."
- Mental: If the defendant has below-average intelligence or is inexperienced, they are still held to the standard of a person with average intelligence. There is no "reasonable foolish person" standard.
Special Relationships and Heightened Duties
Sometimes, the standard shifts. You need to watch for specific relationships that trigger a heightened duty of care:
- Common Carriers & Innkeepers: Historically held to the highest duty of care (liable for slight negligence), though many jurisdictions now apply the general RPP standard.
- Parent-Child / Doctor-Patient: These relationships create an affirmative duty to act that wouldn't exist between strangers.
Foreseeability vs. Zone of Danger
The most famous debate in Torts history—Palsgraf v. Long Island Railroad Co.—settled how we determine who is owed a duty.
- Cardozo (Majority): Duty is owed only to foreseeable plaintiffs within the "Zone of Danger." If the plaintiff is standing miles away, you don't owe them a duty, even if your negligence causes a freak accident that hurts them.
- Andrews (Dissent): You owe a duty to the whole world. If you are negligent, you are liable for the consequences, proximate or not.
Bar Exam Rule: On the MBE, apply the Cardozo (Zone of Danger) view unless the question specifies otherwise.
Table 1: Duty to Entrants on Land
| Status | Definition | Duty Owed |
|---|---|---|
| Undiscovered Trespasser | No permission, owner doesn't know they are there | ❌ No duty (generally) |
| Discovered/Anticipated Trespasser | No permission, but owner knows/expects them | ✅ Duty to warn of known, man-made death traps |
| Licensee | Social guest (friends, family) | ✅ Duty to warn of known, concealed dangers |
| Invitee | Business customer or public invitee | ✅ Duty to inspect and make safe |
Trigger: "Social Guest" → This is a Licensee, not an Invitee. You only need to warn them of known dangers; you don't need to inspect the premises beforehand.
2. Breaching the Duty — When Conduct Falls Short
Once you establish a duty exists, you must prove the defendant failed to meet it. This is the "Breach." Unlike Duty, Breach is a question of fact for the jury.
What Constitutes a Breach? (The Hand Formula)
How do you determine if a risk was unreasonable? You can use the formula developed by Judge Learned Hand in United States v. Carroll Towing Co.: B < PL.
- (B) Burden: The cost of taking the precaution.
- (P) Probability: The likelihood of the harm occurring.
- (L) Loss: The gravity of the harm.
If the Burden (B) of taking a precaution is less than the Probability (P) times the Loss (L), the defendant breached their duty by not taking that precaution.
Negligence Per Se: When Statutes Set the Standard
Sometimes a statute replaces the vague "reasonable person" standard. If a defendant violates a safety statute, that violation itself can establish the breach. To use Negligence Per Se, you must show:
- (A) The plaintiff is in the class of persons the statute was designed to protect.
- (B) The harm suffered is the type of harm the statute was designed to prevent.
Trigger: "Ordinance requires fixing sidewalks" + "Plaintiff trips on broken sidewalk" → Negligence Per Se analysis.
Res Ipsa Loquitur: The Thing Speaks for Itself
What if you know the defendant was negligent, but you don't have direct evidence of exactly what they did wrong? You use Res Ipsa Loquitur. This doctrine allows the jury to infer a breach if:
- (A) The accident is the type that usually doesn't happen without negligence.
- (B) The instrumentality causing the injury was in the defendant's exclusive control.
Canonical Case: Byrne v. Boadle (a barrel falls out of a warehouse window onto a pedestrian). Barrels don't just fall out of windows unless someone was negligent.
3. Causation — Connecting the Breach to the Harm
You have a duty and a breach. Now you need to link that breach to the injury. Causation is a two-step process; you need both.
Actual Cause (Cause-in-Fact): The 'But-For' Test
This is the scientific link. You ask: "But for the defendant's breach, would the injury have happened?"
- If the answer is No (the injury wouldn't have happened), you have Actual Cause.
- If the answer is Yes (the injury would have happened anyway), the defendant's breach didn't cause the harm.
Proximate Cause (Legal Cause): Limiting Liability
Proximate cause is about fairness and foreseeability. Even if you actually caused the harm, the law cuts off liability if the result was too weird or remote.
- The Rule: A defendant is liable only for harms that are within the risk of their negligent activity.
- Foreseeability: Was the type of harm foreseeable? (The exact extent doesn't have to be, just the general type).
Intervening vs. Superseding Causes
This is where students lose points. An intervening cause is an outside force that contributes to the plaintiff's harm after the defendant's act.
Table 2: Intervening vs. Superseding Causes
| Type of Cause | Definition | Effect on Liability |
|---|---|---|
| Intervening Cause | Foreseeable event (e.g., medical malpractice treating the injury, subsequent disease, rescue attempts) | ✅ Defendant stays liable for original + additional harm |
| Superseding Cause | Unforeseeable event (e.g., Acts of God, intentional crimes of third parties, extraordinary negligence) | ❌ Breaks the chain of causation; Defendant NOT liable for new harm |
Common Confusion: Medical malpractice is almost always considered a foreseeable intervening cause. If you break someone's leg and the doctor sets it improperly, you are liable for the broken leg and the doctor's error.
4. Damages — Making the Plaintiff Whole
Negligence is not actionable without actual damage. Unlike intentional torts (where you can sue for nominal damages just because someone slapped you), negligence requires proof of harm.
Compensatory Damages
The goal is to put the plaintiff back in the position they would have been in had the tort not occurred.
- Economic Damages: Medical bills, lost wages, repair costs.
- Non-Economic Damages: Pain and suffering, emotional distress.
The Eggshell Skull Plaintiff Rule
You take your victim as you find them. If you negligently bump into someone, and they happen to have a rare bone condition that causes them to shatter, you are liable for all the damages. You cannot argue, "A normal person wouldn't have been hurt that badly."
Punitive Damages
These are rare in negligence cases. They are generally reserved for conduct that is "willful and wanton," reckless, or malicious. Simple negligence (mere carelessness) does not trigger punitive damages.
Trigger: "Drunk driver" or "known defective brakes ignored" → Look for punitive damages potential (recklessness).
Ready to test your application of these rules? Try running practice questions in your Bar Exam Strategy sessions to see if you can spot the 'But-For' issues instantly.
Applying the 4-Part Framework: Bar Exam Strategy
Tackling Duty of Care Questions on the MBE
When you see a Torts question, pause. Identify the call of the question. If it asks "Is the Defendant liable?", run the full 4-part mental checklist.
- Duty: Was the plaintiff in the zone of danger?
- Breach: Did D act like a reasonable person?
- Causation: Did the breach actually and proximately cause the harm?
- Damages: Is there real injury?
Trigger: "Motion for Directed Verdict" or "Summary Judgment" → These procedural hooks usually test the Duty element because Duty is a question of law for the judge.
Structuring Your Torts Essays
For the MEE (Multistate Essay Exam), use headers that mirror this framework.
- Heading 1: Duty. Define the RPP standard. Discuss any special relationships.
- Heading 2: Breach. Apply the facts. Did they look while crossing the street? Did they clean the spill?
- Heading 3: Causation. explicitly separate Actual Cause and Proximate Cause into two sub-headers.
- Heading 4: Damages. Briefly mention the harm.
Common Pitfalls: Mistakes to Avoid
Confusing Duty to Act vs. Misfeasance
There is generally no duty to rescue a stranger in peril. If you see a person drowning, you can sit on the dock and watch.
- Exception: If you put them in peril.
- Exception: If you start to rescue, you must do so reasonably (you can't leave them in a worse position).
Misapplying the Foreseeability Standard
Students often mix up foreseeability in Duty vs. Proximate Cause.
- Duty: Is the plaintiff foreseeable? (Palsgraf)
- Proximate Cause: Is the harm foreseeable?
Defenses: Comparative vs. Contributory Negligence
Always check the jurisdiction.
- Contributory Negligence: If Plaintiff is even 1% at fault, they get $0. (Old common law, harsh).
- Pure Comparative Negligence: Plaintiff recovers even if 99% at fault (recovers 1%).
- Partial/Modified Comparative: Plaintiff recovers only if their fault is less than (or equal to) 50%.
Table 3: Impact of Plaintiff's Fault
| Jurisdiction Type | Plaintiff 10% at Fault | Plaintiff 51% at Fault |
|---|---|---|
| Contributory Negligence | ❌ $0 Recovery | ❌ $0 Recovery |
| Pure Comparative | ✅ Recovers 90% | ✅ Recovers 49% |
| Modified Comparative (50% Bar) | ✅ Recovers 90% | ❌ $0 Recovery |
Quick Recap: Your 4-Part Checklist
- Duty: RPP Standard + Foreseeable Plaintiff.
- Breach: Risk > Utility (Hand Formula).
- Causation: But-For + Foreseeable Harm.
- Damages: Actual Injury + Eggshell Skull.
FAQs: Your Top Questions About Duty Answered
Does Duty of Care Apply to Intentional Torts?
No. Intentional torts (Battery, Assault, etc.) require intent, not a duty of care. You don't need to prove the defendant owed you a duty not to punch you; the law prohibits the act itself.
What's the Difference Between Duty and Standard of Care?
"Duty" answers if you are legally obligated to protect someone. "Standard of Care" tells you how you must act to fulfill that obligation (e.g., like a reasonable person, or like a specialist doctor).
Can a Business Owe a Duty of Care to a Trespasser?
Generally, no. However, if the business knows trespassers frequently use a specific path (discovered/anticipated trespassers), they owe a duty to warn of known, hidden, man-made death traps.
Final Thoughts: Mastering Duty for Bar Exam Success
Torts questions often feel like a chaotic car crash of facts. Your job is to bring order to that chaos. By strictly applying this 4-part framework, you stop guessing and start analyzing.
Remember, the bar exam isn't testing your ability to memorize accidents; it's testing your ability to apply logic. Master the elements, watch out for the "Zone of Danger," and keep your analysis structured.
To practice keeping your cool when applying these frameworks under pressure, check out our guide on Mastering the Cold Call. You have the tools; now go apply them.
Go deeper: Study our comprehensive Torts outlines covering negligence, strict liability, products liability, and defenses.
- #1L
- #MBE
- #Negligence
- #Torts