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PHIL 1010 - Week 5

by: Lydia Purcell

PHIL 1010 - Week 5 PHIL 1010 - 001

Lydia Purcell

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About this Document

This covers the rest of chapter 4 and chapters 10 - 14.
Introduction to Logic
Leila E Batarseh
Class Notes
Philosophy - Intro to Logic
25 ?




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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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