How to identify and solve parallel reasoning and principle question types on the LSAT. Front: the question type. Back: a strategy tip for approaching it.
36 cards · basic cards · AI-written, checked twice. Edit anything.
- Parallel Reasoning: What is the core task?
- Identify the argument's logical structure (premises and conclusion), then find the answer choice that mirrors that same structure, not necessarily the same content.
- Parallel Reasoning: Why diagram first?
- Breaking down the argument into premise-by-premise reduces noise. Write out: Premise 1 says X, Premise 2 says Y, Conclusion says Z. Then hunt for answers matching that shape.
- Parallel Reasoning: When must quantifiers match?
- Always. If the original says 'some,' the answer must say 'some,' not 'all.' If the original uses 'no,' the parallel must use 'no.' Mismatched quantifiers kill the parallel.
- Parallel Reasoning: Causal language trap
- If the original says 'X causes Y,' do not pick answers saying 'X correlates with Y' or 'X and Y co-occur.' Parallel requires the same causal claim, same direction.
- Parallel Reasoning: Conditional statements strategy
- Map If...then structures carefully. If the original chains If A then B, and If B then C, the parallel must show the same chain, not a reversed or standalone conditional.
- Parallel Reasoning: Temporal language matters
- If the original says 'before,' 'after,' or 'because then,' the parallel must preserve that timing. Swapping temporal sequence breaks the parallel.
- Parallel Reasoning: Negation pitfall
- If the original negates a claim ('Not all X are Y'), do not confuse it with a positive claim ('Some X are not Y'). The parallel must match the negation structure exactly.
- Parallel Reasoning: Exclusive language ('only')
- If the original says 'only X qualify,' the parallel must say 'only,' not 'all' or 'most.' Exclusive phrasing is structural and must match precisely.
- Parallel Reasoning: Read the conclusion first
- The conclusion reveals the argument's core claim. Once you know what the argument concludes, you can recognize when answer choices diverge from that structure.
- Parallel Reasoning: Pronoun and reference tracking
- If the original refers to 'this' or 'that' and then applies a rule to it, the parallel must show the same reference flow. Lost pronouns mean a broken parallel.
- Principle questions: Identify the variant first
- Ask: Does this question ask me to apply a rule to a new scenario, or to recognize which principle an example illustrates? The variant determines your strategy.
- Principle: Apply-the-principle variant
- A broad rule is given in the stimulus. Pick the answer that correctly follows that rule when applied to a new situation. Test each answer against the rule's logic.
- Principle: Illustrates-the-principle variant
- The stimulus gives a concrete example. The question asks which principle the example best illustrates. Reverse engineer the rule from the example.
- Principle: Working with broad rules
- Abstract principles can feel vague. Make them concrete: rephrase 'Efficiency should be balanced against fairness' as 'If a choice saves time but harms someone unfairly, do not make it.'
- Principle: Concrete examples strategy
- When the stimulus describes a specific situation, extract the pattern: Why did this actor choose this action? What value or rule drove the choice? That is the principle.