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Old 03-16-2008, 11:43 PM
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Jim_Johnston Jim_Johnston is offline.
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i.e.,

Quote:
A deductive argument is said to be valid if and only if it takes a form that makes it impossible for the premises to be true and the conclusion nevertheless to be false. Otherwise, a deductive argument is said to be invalid.
Thus in my argument, if the premises were true, the conclusion couldn't be false.

You intimated that my conclusion was false.

Thus one of the premises *had to be false.*

That was [1].

Thus you would be bound to agree that Morey's argument was *unsound.*
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