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Old 30th March 2020, 02:54 PM   #247
Robin
Penultimate Amazing
 
Join Date: Apr 2004
Posts: 12,134
Originally Posted by caveman1917 View Post
LP does not have an axiom of non-contradiction.
And modus ponens is invalid in LP, as even Priest says.
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The non-theoretical character of metaphysics would not be in itself a defect; all arts have this non-theoretical character without thereby losing their high value for personal as well as for social life. The danger lies in the deceptive character of metaphysics; it gives the illusion of knowledge without actually giving any knowledge. This is the reason why we reject it. - Rudolf Carnap "Philosophy and Logical Syntax"
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