AS 3 - e. If an argument is valid with true premises, its...

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Assignment 3 Name:Liu Jialin Student No. 301091398 Exercises 1, 2, and 3 on pages 92-93 1. a. If an argument is ill-formed, the conclusion is definitely false. b. If an argument is valid, I canot tell what truth value is because validity has to do only with the connection between premises and conclusion. It depends on the truth value of the premises. Truth of premises guarantees truth of conclusion. c. Its other premises must be definitely false since it is impossible for the premises to be true and the conclusion false if an argument is valid. d. If an argument is cogent and its conclusion is true, its premises are definitely true.
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Unformatted text preview: e. If an argument is valid with true premises, its conclusion is definitely true. 2. a. Valid b. ill-formed c. Cogent 3. a. 1. All As are Bs. 2. X is an A. 3. X is a B. Its a valid argument. b. 1. All As are Bs. 2. X is an A. 3. X is a B. Its a valid argument. c. 1. Most As are Bs. 2. X is an A. 3. X is a B. Its a cogent argument. d. 1. Most As are Bs. 2. X is a C. 3. C is a B. Its an ill-formed argument. e. 1. Most As are Bs. 2. X is a C. 3. C is a B. Its an cogent argument....
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This note was uploaded on 06/27/2010 for the course PHIL philoXX1 taught by Professor Harbon during the Fall '08 term at Simon Fraser.

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