Philosophy_110_chp7_chp8[1] - 3/19/2009 Chapter 7:...

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3/19/2009 1 MIKE OLSEN SPRING 2009 SAN FRANCISCO STATE UNIVERSITY Chapter 7: Introduction to Argument Evaluation The Good… and the Bad This chapter is about evaluating arguments, most generally, as either GOOD or BAD. There are two things to evaluate in an argument: A Premise An Inference A Bad (False) Premise Tomorrow is Sunday, since today is Saturday. (Said on a weekday night.) A Bad Inference Barrack Obama is now President, since snow is white. Note: The conclusion is true, but the conclusion does not follow the premise. Barrack Obama is now President, because today is Tuesday. What do we evaluate? NEVER EVALUATE: CONCLUSIONS or DEFENDED PREMISES We may disagree with the conclusion, but if we deal directly with a conclusion – we haven’t dealt with the person’s argument. That is, what are their REASONS, and HOW do they get to that conclusion.
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3/19/2009 2 The Ethics of Argument Evaluation “To sum up: it is wrong always, everywhere, and for anyone, to believe anything upon insufficient evidence.” – W.K. Clifford
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Philosophy_110_chp7_chp8[1] - 3/19/2009 Chapter 7:...

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