Arguments - TopicsoftheDay(9/7) I.Review A. B....

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 3/4/11 Topics of the Day (9/7) I. Review A. The Primary Concern of Logic B. What is an Argument II. Some Features of Arguments A. Propositions B. The Premises C. The Conclusion III.  Recognizing Arguments
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 3/4/11 I. Review a. The Primary Concern of Logic When evaluating whether a set of premises supports a  conclusion, ask: 1. Are the premises true? 2. Does the conclusion follow from the premises? 
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 3/4/11 I. Review b. What is an argument? An  argument  is a set of propositions in which some of the  members of the set (the ‘ premises ’) are intended to  provide evidential support for one of the propositions (the  conclusion ’).   All men are mortal. Socrates is a man. Therefore, Socrates is mortal. Premises Conclusion Argument
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 3/4/11 II. Some Features of Arguments a. Propositions Propositions are the basic building blocks of arguments. A proposition is a statement that can be evaluated as  true or false.  Propositions Barack Obama is the President. There is beer in the fridge. I like apple pie.  Not Propositions Is Barack Obama the President? Get me a beer. Mmm, apple pie!
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 3/4/11 Types of non-propositions Non-Propositions: Examples: Questions “Does this outfit make me look fat?” Commands “Shut the front door.”  Expressives “Wow!” Performatives “I now pronounce you husband and wife.”
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 3/4/11 A single sentence can express more than  one proposition “Obama is the president and Biden is the vice president.” “Since there are clouds in the sky, it will probably rain.”
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Arguments - TopicsoftheDay(9/7) I.Review A. B....

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