@Lafari@lemmy.world to No Stupid Questions@lemmy.world • 1 year agoIs "If A then B" equal to "B if and only if A"?message-square60fedilinkarrow-up151arrow-down111
arrow-up140arrow-down1message-squareIs "If A then B" equal to "B if and only if A"?@Lafari@lemmy.world to No Stupid Questions@lemmy.world • 1 year agomessage-square60fedilink
minus-squarekrdolinkfedilink1•1 year agoThe first statement only tells you when B is true. It says nothing about when it is false. The second statement both tells you when B is true (if A) and when it is not (only if A). Therefore, the two statements cannot be equal.
The first statement only tells you when B is true. It says nothing about when it is false. The second statement both tells you when B is true (if A) and when it is not (only if A). Therefore, the two statements cannot be equal.