Logical Reasoning · Question Type
Weaken Questions
Which choice most undermines the argument?
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64 free practice questions
Weaken questions ask which fact, if true, would damage the argument. As with Strengthen, causal arguments dominate — the credited answer usually introduces an alternative cause.
Strategy for Weaken questions
- Attack the assumption, not the premises.
- For causal claims, alternative-cause and reversed-causation answers are the strongest.
- Do not choose answers that merely 'weaken a premise' — LSAT arguments take premises as given.
How this type shows up on the 2026 LSAT
Weaken questions appear on both scored Logical Reasoning sections. With LR now contributing roughly two-thirds of your scaled score, mastering high-frequency types like this one is one of the highest-ROI activities in LSAT prep. Slot dedicated weaken drills into a structured 12-week LSAT roadmap, then benchmark your gains inside a full LR practice test or a complete timed test-day simulation.