what does this symbol mean "¬"?
i was reading an essay and it said
"Philosophers or scientists who think that
indeterminism gives freedom of will forget the rules of classical logic and claim that "(p −−> ¬q)
implies (¬p −−> q)", where "p" stands for determinism and "q" stands for freedom of will. This
argument is false. "
whats the meaning of (p −−> ¬q)
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Not.
The statement ¬A is true if and only if A is false.
Logical negation
http://en.wikipedia.org/wiki/Logical_negation
it is one of many ways to write "not"
2 +3 = 5
2 + 3 = not sign 6
there is a whole system of math called "symbolic logic"