Does "If A then B mean if not B then not A" ?

rickstamp at gmx.net rickstamp at gmx.net
Thu Jun 28 16:17:00 EDT 2001


I have seen it stated that it is a logical fallacy when one assumes that a conditional statement is also true in the reverse as in "If A, then B is not equal to if non-A, then non-B) as described by Wallace on page 687.   Could one also state that this is also the case for "if not B then not A"?    Assume a third class conditional with EAN + subjunctive followed by an apodosis in the future.

Sincerely,
Rick Stamp






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