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单词 Major Term
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Major Term

英语百科

Syllogism

Relationships between the four types of propositions in the square of opposition(Black areas are empty,red areas are nonempty.)



 M:reptileS:snake   P:fur



 M:rabbitS:pet   P:fur



 M:homeworkS:reading   P:fun

A syllogism (Greek: συλλογισμός syllogismos, "conclusion, inference") is a kind of logical argument that applies deductive reasoning to arrive at a conclusion based on two or more propositions that are asserted or assumed to be true.

In its earliest form, defined by Aristotle, from the combination of a general statement (the major premise) and a specific statement (the minor premise), a conclusion is deduced. For example, knowing that all men are mortal (major premise) and that Socrates is a man (minor premise), we may validly conclude that Socrates is mortal. Syllogistic arguments are usually represented in a three-line form (without sentence-terminating periods):

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