Principle Questions on the LSAT: Matching Rules to Situations

A principle is a general rule, usually conditional in form: if a certain condition holds, then a certain judgment follows. LSAT principle questions test your ability to move between the general rule and a specific situation.

There are two directions. In one, the stimulus gives a principle and you find the situation that correctly applies it. In the other, the stimulus gives a specific judgment and you find the principle that justifies it. Identify the direction from the stem before you start.

Most principles can be diagrammed as a trigger and a result. If an action causes avoidable harm and the actor knew this, then the action is wrong. To apply that principle, the situation must satisfy every condition in the trigger.

This is where precision matters. If the principle requires that the actor knew about the harm, then a situation where the actor was unaware does not trigger the rule, no matter how bad the outcome was. Match every condition, not just the gist.

When the stem asks which principle would justify the conclusion, the correct principle must be strong enough to actually guarantee the judgment. It is like a sufficient assumption: plug it in and the conclusion must follow.

Be wary of principles that are too narrow to cover the case, or that introduce a condition the facts never establish. The right principle bridges exactly the facts given to exactly the judgment drawn.

Other questions ask which judgment conforms to the principle. Here you are checking that the specific decision is consistent with the rule, not contradicting it. A judgment that the principle neither requires nor forbids can still be wrong if a different answer is more squarely supported.

Read the principle's strength carefully. Words like only, always, never, and unless change exactly which cases the rule governs.

Determine the direction: rule to case, or case to rule. Diagram the principle as conditions and a result. For application, verify every triggering condition is met by the facts. For justification, confirm the principle guarantees the conclusion. Eliminate answers that overshoot or undershoot the conditions.