Logical Reasoning
LSAT Principle Questions
Apply or identify the general rule behind the argument
What It Is
Principle questions bridge abstract rules and concrete situations. Identify the Principle: given a specific situation, find the general rule that justifies the reasoning. Apply the Principle: given a general rule, find the situation it applies to or use it to justify a conclusion.
Identify the Principle -- Attack Strategy
- Step 1: Find the conclusion and premises of the stimulus
- Step 2: Ask: what general rule, if true, would make this reasoning valid?
- Step 3: The correct answer should be broad (a rule) but precise enough to apply directly to the stimulus
Apply the Principle -- Attack Strategy
- Step 1: Identify all conditions in the principle precisely -- note every 'if,' 'only if,' 'unless,' and 'when'
- Step 2: For each answer, check whether the situation satisfies the rule's trigger conditions
- Step 3: Then check whether the conclusion drawn in the answer actually follows from applying the rule
Example Problem
Principle: 'A company should discontinue a product only if that product generates consistent losses AND no foreseeable market exists.' Application: Company X's product has lost money for three years but analysts predict a new market will emerge. Answer: Company X should NOT discontinue the product because the second condition (no foreseeable market) is not met.
Common Wrong Answer Traps
- Answers that capture the spirit of the principle but miss a specific condition
- Answers where the situation matches but the conclusion drawn is wrong
- Answers that apply a related but subtly different principle
Top Tips
- Read the principle with extreme precision -- every word in a conditional statement matters
- Wrong answers often satisfy SOME conditions of the principle but not ALL
- Principle questions reward careful reading more than any other type
