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syllogism

syl·lo·gism [ síllə jìzzəm ] (plural syl·lo·gisms)


noun 
Definition:
 
1. logical argument involving three propositions: a formal deductive argument made up of a major premise, a minor premise, and a conclusion. An example is, "All birds have feathers, penguins are birds, therefore penguins have feathers."

2. deductive reasoning: reasoning from the general to the specific

3. example of deduction: an example of deductive reasoning

4. specious argument: a subtle piece of reasoning, or one that seems true but is actually false or deceptive

[14th century. Via Latin< Greek sullogismos< sullogizesthai "infer" < logos "reason"]
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