Deductive Fallacy
In philosophy, the term logical fallacy properly refers to a formal fallacy: a flaw in the structure of a deductive argument which renders the argument invalid.
However, the same terms are used in informal discourse to mean an argument which is problematic for any reason.
A logical form such as A and B is independent of any particular conjunction of meaningful propositions. Logical form alone can guarantee that given true premises, a true conclusion must follow. However, formal logic makes no such guarantee if any premise is false, the conclusion can be either true or false. Any formal mistake or logical fallacy similarly invalidates the deductive guarantee. The so-called fallacy fallacy is a failure to understand that all bets are off unless the argument is formally flawless and all premises are true.
Read more about this topic: Fallacy
Famous quotes containing the word fallacy:
“It would be a fallacy to deduce that the slow writer necessarily comes up with superior work. There seems to be scant relationship between prolificness and quality.”
—Fannie Hurst (1889–1968)