Comment by matt4077
9 years ago
> He is also effectively saying that since he can and will remove sites he personally doesn't like, that he personally approves of every other site using Cloudflare
A -> B does not imply !B -> !A
Example: if you eat an Apple, saying "hey, that's one good-looking Apple!", it does not require you to heretofore eat every good-looking Apple you come across.
> A -> B does not imply !B -> !A
A -> B does imply !B -> !A. The error in reasoning here seems to be that attitude towards a website is assumed to be a binary "like/not like" variable, while in reality one can also neither like nor dislike something.
No it doesn't. Just because you tell me you don't like to get shot doesn't mean you are ok with being stabbed.
Yes it does. In fact, in classical logic, A->B is equivalent to !B->!A. See https://en.m.wikipedia.org/wiki/Contraposition
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While it pains me to admit: They're actually right, and I was wrong above.