If car, then vehicle = true
Car if and only if vehicle = true.
Is this correct?
Therefore “If A then B” = “A if and only if B” (or “If B then A” = “B if and only if A”)?
Comment on Is "If A then B" equal to "B if and only if A"?
Ep1cFac3pa1m@lemmy.world 5 months ago
If Nazi, then fascist = true Fascist, if and only Nazi = not true
If car, then vehicle = true Vehicle if and only if car = not true
Lafari@lemmy.world 5 months ago
zenharbinger@lemmy.world 5 months ago
B can still be true when a is false. iff means that b can only be true when a is true.
Ep1cFac3pa1m@lemmy.world 5 months ago
You’d have to firm up your definition of car and vehicle before you could decide that one. Does a hot wheels car count as a car? Does a vehicle have to be large enough to move people or freight?
zenharbinger@lemmy.world 5 months ago
Don’t confuse this guy with ontological questions.
Valmond@lemmy.mindoki.com 5 months ago
I used the bananas are fruits analog but your one works well too!
Ep1cFac3pa1m@lemmy.world 5 months ago
I just figured with Lemmy’s interest in politics it seemed like an obvious example. I threw in the car because I didn’t want to be that guy who makes everything about nazis…
Boinkage@lemmy.world 5 months ago
Yeah careful with that, the logic example Nazis will be all over you if you don’t mix it up some.
Ep1cFac3pa1m@lemmy.world 5 months ago
Not everything is about Nazis, Boinkage, geez…