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Inconsistency

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(also known as: internal contradiction, logical inconsistency)

Description: In terms of a fallacious argument, two or more propositions are asserted that cannot both possibly be true.  In a more general sense, holding two or more views/beliefs that cannot all be true together.  Quotes from Yogi Berra (even if apocryphal) are great examples of fallacies, especially inconsistencies.

Example #1:

"I never said most of the things I said." - Yogi Berra

Explanation: I know this requires no explanation, and I don't mean to insult your intelligence, but for consistency's sake, I will explain.  If he had said those things, then he said them, which is a contradiction to his claim that he never said them. This is both an internal inconsistency and a logical inconsistency. It is internal because the inconsistency is contained within the statement itself; it doesn't require any other premises or arguments.

Example #2:

"Nobody goes there anymore.  It's too crowded." - Yogi Berra

Explanation: Again, I apologize, but here it goes... If "nobody" went there, then it could not possibly be crowded, since "crowded" implies too many people are there. This is both an internal inconsistency and a logical inconsistency.

Exception: One needs to be able to explain how the beliefs are not inconsistent.

Tip: Think about your beliefs.  Are there any inconsistent with each other?  Any inconsistent with how you act and what you do?

References:

This a logical fallacy frequently used on the Internet. No academic sources could be found.



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