2. Contrapositive

We just studied if A, then B. The contrapositive is if you flip and invert that.

If the momma bear crosses the river, then the baby bear also did. Converse: If the baby bear didn’t cross the river, then it means that the momma bear didn’t, either.

Those who contrapose will do well on the LSAT (contrapose: the act of making a contrapositive). Why? You can take conditional rules and double them by contraposing the original conditional. Take a single conditional:

And, poof!, it becomes two valid conditionals after you contrapose the original (flip the statements and invert them).

Next LSAT: January 26

Here’s a minor diversion into pop culture and formal logic. More info about site-sponsor Kaplan LSAT.

Next LSAT: January 26