Lafari@lemmy.world to No Stupid Questions@lemmy.world · 9 个月前Is "If A then B" equal to "B if and only if A"?message-squaremessage-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 · 9 个月前message-square60fedilink
minus-squareBoinkage@lemmy.worldlinkfedilinkarrow-up9·edit-29 个月前Ya wrong. If Tuesday, then pizza. And, if Friday, then pizza. The contrapositive : if not pizza, then not Tuesday and not Friday. What day is it? We’re not having pizza. So it’s not Tuesday or Friday. Google contrapositives then holla back
Ya wrong.
If Tuesday, then pizza. And, if Friday, then pizza.
The contrapositive : if not pizza, then not Tuesday and not Friday.
What day is it? We’re not having pizza. So it’s not Tuesday or Friday.
Google contrapositives then holla back
That’s a key detail I now see