Logically Fallacious: The Ultimate Collection of Over 300 Logical Fallacies by Bennett Bo

Author:Bennett, Bo [Bennett, Bo]
Language: eng
Format: epub, mobi
Tags: Nonfiction
ISBN: 9781456607371
Publisher: eBookIt.com
Published: 2012-02-21T06:00:00+00:00

False Conversion

(also known as: illicit conversion)

New Terminology:

Type “A” Logical Forms: A proposition or premise that uses the word, “all” or “every” (ex. All P are Q)

Type “E” Logical Forms: A proposition or premise that uses the word, “none” or “no” (ex. No P are Q)

Type “I” Logical Forms: A proposition or premise that uses the word, “some” (ex. Some P are Q)

Type “O” Logical Forms: A proposition or premise that uses the terms, “some/not” (ex. Some P are not Q)

Description: The formal fallacy where the subject and the predicate terms of the proposition are switched (conversion) in the conclusion, in a proposition that uses “all” in its premise (type “A” forms), or “some/not” (type “O” forms).

Logical Form:

All P are Q.

Therefore, all Q are P.

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