Logic & Philosophy 9: Indirect Proof

preview_player
Показать описание

Рекомендации по теме
Комментарии
Автор

ah man at 24:01-24:14 I just noticed an embarrassing mistake. "P only if Q" means that Q is a necessary condition for P (without Q you don't get P), and that P is a sufficient condition for Q...I am sure there are many other embarrassing mistakes I haven't yet noticed!

onemorebrown