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MattyDub
on Jan 3, 2012
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Awesome but Useless
Sorry, maybe I'm misreading your notation, but are you saying that modus tollens isn't a valid argument?
http://en.wikipedia.org/wiki/Modus_tollens
pilgrim689
on Jan 3, 2012
[–]
I think he's using a logical implication notation "|=". as in: A => B logically implies that: ~B => ~A
He just decided to use "/=" rather than "|="...so it looks weird...
MattyDub
on Jan 3, 2012
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Ah, I'd read that as "does not equal", rather than "implies". Thanks pilgrim689.
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