LSAT Logic Games Rule Substitution Questions

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.

Here's the full list (up to the May 2020 LSAT-Flex Sample):

May 2020 LSAT-Flex Sample, #11

PrepTest C2, Section 1, #23
PrepTest 57, Section 1, #5
PrepTest 58, Section 4, #23
PrepTest 59, Section 2, #10
PrepTest 61, Section 3, #11
PrepTest 62, Section 3, #6
PrepTest 63, Section 1, #5
PrepTest 64, Section 2, #12
PrepTest 65, Section 2, #23
PrepTest 66, Section 3, #11
PrepTest 69, Section 2, #17
PrepTest 70, Section 3, #8
PrepTest 71, Section 2, #5
PrepTest 71, Section 2, #16
PrepTest 72, Section 4, #13
PrepTest 73, Section 3, #13
PrepTest 74, Section 2, #23
PrepTest 75, Section 4, #18
PrepTest 76, Section 3, #23
PrepTest 77, Section 3, #23
PrepTest 78, Section 2, #23
PrepTest 80, Section 3, #11
PrepTest 81, Section 4, #6
PrepTest 81, Section 4, #23
PrepTest 82, Section 2, #7
PrepTest 83, Section 4, #17
PrepTest 83, Section 4, #23
PrepTest 84, Section 4, #17
PrepTest 85, Section 4, #6
PrepTest 86, Section 2, #6
PrepTest 87, Section 4, #17
PrepTest 88, Section 1, #17
PrepTest 89, Section 1, #12