A Concise Introduction to
Logic 13th Edition Chapter 3
Terms Study Guide
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, A Concise Introduction to Logic (13th Ed) Chapter 3 Terms Page 2 2026-03-18
Fallacy
A defect in an argument that arises from either a mistake in reasoning or the creation of an illusion that makes a bad
argument appear good.
Formal Fallacy
May be identified by merely examining the form or structure of an argument. Fallacies of this kind are found only in
deductive arguments that have identifiable forms.
Informal Fallacies
Can be detected only by examining the content of an argument.
Fallacies of Relevance
Arguments in which the premises are logically irrelevant to the conclusion. Premises may appear to be
psychologically relevant, so the conclusion may seem to follow from the premises, even though it does not follow
logically
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