Comment on Is "If A then B" equal to "B if and only if A"?
BananaTrifleViolin@kbin.social 1 year agoActually a good example:
- If you have Aids (A) then you have HIV (B). True
- You have HIV (B) if, and only if, you have AIDS (A). Not true
- If you don't have HIV (B), then you don't have AIDs (A). True, and the actual inverse of "If A then B"; "If not B, then not A"
AmidFuror@kbin.social 1 year ago
It's important to stress the "full blown" modifier in any example.