LSAT Logic Games Rule Substitution Questions

Note: the LSAT no longer has Logic Games. LSAC removed the section in August 2024. The scored test is now 2 Logical Reasoning sections and 1 Reading Comprehension section, plus 1 unscored experimental section. This post stays up as an archive, and the reasoning skills still carry over, but you won’t see a game on test day.

LSAT Logic Games Rule Substitution questions (aka Rule Equivalency or Equivalent Rule questions) began with LSAT PrepTest 57 and have appeared on nearly every exam since.

Use the following strategies to solve these questions

- Check each answer choice against previous diagrams.

Determine if each choice would allow each previously-valid scenario to still work.

Ask if any of the choices impose new limits or allow scenarios previously not permitted.

- Eliminate all answers that violate your diagrams.

If a choice isn’t compatible with your main diagram or local ones, eliminate it. The answer must enforce all original constraints without adding new ones.

- Check for deductions. 

The correct answer will lead to the same deductions when combined with the original rules (or may even reveal those deductions directly).

To practice, drill questions from previous exams.

I've written free explanations for every question in LSAT PrepTest 159, 158, 157, 156, 155 and 154, with the right answer and why each wrong answer fails. All LSAT explanations are here.

Enough reading. Try a question. Free LSAT drills, 1 at a time, explained the second you answer. Start free drills