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.