PHIL 1010 - Week 5
PHIL 1010 - Week 5 PHIL 1010 - 001
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This 2 page Class Notes was uploaded by Lydia Purcell on Wednesday February 24, 2016. The Class Notes belongs to PHIL 1010 - 001 at Auburn University taught by Leila E Batarseh in Fall 2015. Since its upload, it has received 57 views. For similar materials see Introduction to Logic in PHIL-Philosophy at Auburn University.
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Date Created: 02/24/16
Philosophy Chapter 4 February 3 ,d 2016 Invalid Arguments: F premise, T conclusion T premise, F conclusion F premise, F conclusion T premise, T conclusion = no relation *Valid arguments can not be T premise, F conclusion Modest Tollens *Invalid arguments can have any combination Can not be self-contradictory It might be possible = counterarguments Be wacky with the possibilities Philosophy Chapter 4 February 15 ,th 2016 Implication can go one way, or can go both ways Ex. I have ten dogs. I have more than one dog. I am more mature than my younger brother. My brother is less mature than I am. (logically equivalent) If the first is true, does it imply the second? If the second is true, does it imply the first? Does P imply Q…Does Q imply P? Contingent Statements – statements that are true or false. Look at the world to answer it. Either necessarily true or necessarily false o Ex. Lydia was born in California. (could be true, could be false) Can you imagine circumstances in which it is true or it is false? Tautology – true in all situations; no need to look at the world. Impossible to be false. Ex. 1 + 1 = 2 “Hello” is a greeting. All humans are people. Contradictions – impossible to be true Ex. 0 + 0 = 10 People can only be taller than 5’-0”. Auburn is a college. Auburn is not a college. Philosophy Chapter 10-14 February 19 ,th 2016 True Functional Logic Ignore the content, and look at the structure. Substitute letters for variables Constant – using a letter to represent part of an argument wall the way through that statement. Propositional Logic – truth function Functional Math – relates one set of values to another Truth Value – truth value of components in a compound sentence 5 Operators 1. “and” symbol = & conjunction left conjunct & right conjunct 2. “but” symbol = & 3. “however” symbol = & 4. “moreover” symbol = & 5. “yet” symbol = & 6. “in spite of” symbol = & Only false when both are false
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