HO Fundamentals (Logic PowerPoint)

HO Fundamentals (Logic PowerPoint) - Slide 1 The...

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Unformatted text preview: Slide 1 The Fundamentals of Deductive Logic Logic is the study of correct reasoning; it is essential to philosophy. ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Slide 2 Our Objective: To learn how to use the vocabulary of logic with fluency. ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Slide 3 Key Terms and Concepts: proposition argument conclusion premise (in)consistency validity counterexample soundness ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Slide 4 §§1-2. Propositions and Sentences ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Slide 5 Propositions: 1. are the objects of belief; 2. are either true or false; and 3. are expressed in sentences. ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Slide 6 Sentences ≠ Propositions Some sentences may express more than one proposition. ‘Christopher Columbus failed to find a passage to India in 1492, but he discovered the New World.’ Some sentences do not express propositions at all. ‘Who said, “Al ’s fair in love and war”?’ ‘Ow! Quit it!’ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Slide 7 Sentences come in different kinds: declarative (descriptive) declarative (performative) interrogative imperative exclamatory ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Slide 8 But a sentence expresses a proposition ONLY IF: it makes sense to ask whether someone who uses it formulates a belief; AND it makes sense to ask whether what it says is true or false....
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This note was uploaded on 01/29/2011 for the course PHIL 2010 taught by Professor Snyder during the Fall '06 term at Georgia State.

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HO Fundamentals (Logic PowerPoint) - Slide 1 The...

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