Comment by TKoL on At what point in the history of mathematics, and why, did mathematicians come to say "A implies B" to mean "not A or B"?

@Speakpigeon can you think of an exmaple, yourself, where A -> B is (at least broadly) true, but B -> A is not true? If you can, you can transform that example into (not A) or B and see for yourself how it works out.