PT59.S1.G3 - alicia will take exactly four courses this semester

mitrakhanom1

http://7sage.com/lsat_explanations/lsat-59-section-1-game-3/
I don't understand what is the difference between the biconditional used in the video G<-> /W and when you write the conditional G-> /W? If the biconditional means never together and always apart why can't we use the conditional. The conditional is going from positive to negative, which means you can't have both, and can only have one or the other.

Jonathan Wang

G -> /W means you can leave both G and W out, together. G <-> /W fixes that.