Deductive Reasoning Chapter 2 Lesson 4.

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Presentation transcript:

Deductive Reasoning Chapter 2 Lesson 4

Deductive Reasoning The process of reasoning logically from given statements or facts to a conclusion. It is also called logical reasoning

Law of Detachment If the hypothesis of a true conditional is true, then the conclusion is true. If the conditional is true and P is true then Q must be true.

Law of Syllogism Allows you to state a conclusion from two true conditional statements when the conclusion of one statement is the hypothesis of the other statement. Meaning if P then Q is true, and if Q then R is true, then if P then R must be true.

Page 108 Look at Problem 2 for an example of use of the law of Syllogism