Quote Originally Posted by mrdevious
Logical Fallacies:
Dude, modus ponens and modus tollens aren't fallacies, they're two of the most basic forms of valid logic. I think you're confusing "affirming the antecedent" and "denying the consequent" for "denying the antecedent" and "affirming the consequent".

Modus Ponens
If A then B
A
Therefore B

Modus Tollens
If A then B
~B (not B)
Therefore ~A

A Fallacy along these lines would be either:
A->B, B, therefore A
Or A->B, ~A, therefore ~B

On another note, which I'm surely guilty of now as well, way to overemphasize syntax instead of semantics...

Penguin, if you want to learn, try a more directed question... :thumbsup:
Polymirize Reviewed by Polymirize on . Philosophy Hey all. I really want to learn as much about philosophy I possibly can before I ever set foot in a college classroom...which is 3 years off for me...So, I was wondering, could anyone who is very knowledgeable on the subject teach me anything? Thanks much, Jake Rating: 5