PSY30400 Chapter Notes - Chapter 13: Syllogism, Deductive Reasoning
Chapter 13: Judgement, Decisions, and Reasoning
Section 13.3:
• Deductive Reasoning:
o determine whether a conclusion LOGICALLY FOLLOWS from statements called
premises
o Aritstotle =
▪ father of deductive reasoning, who introduced syllogism
• consists of two premises followed by a third statement called a
conclusion
o Categorical Syllogisms:
▪ premises and conclusion are statements that begin with ALL, NO, or
SOME
• Validity and Truth in Syllogisms:
o Valid:
▪ something that is true or might be true, but when used with a categorical
syllogism, it has a different meaning
• a syllogism is valid when the form of the syllogism indicates that
its conclusion follows LOGICALLY from its two premises
▪ Does not have anything to do with the conclusion being true when talking
about validity of a syllogism
▪ IMPORTANT:
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