MIT24_241F09_handout02

# MIT24_241F09_handout02 - Logic I Fall 2009 Session 2...

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Logic I Fall 2009 Session 2 Handout Things to know from last time: Validity. A(n) . . . . . . . . . . . . is valid iF . . . Soundness. A(n) . . . . . . . . . . . . is sound iF . . . Connectives. Molecular / compound sentences. Atomic / simple sentences. Truth-functionality. A connective is truth-functional iF . . . Also: a couple things we didn’t get to last time: Logical truth / falsehood Logical indeterminacy Logical consistency Logical equivalence The plan for today: Syntax of SL, connectives, truth-tables, translation issues. The symbols of SL: A, B, C, . . . , H 7 ,J 3 , . . . , , , , , (, ). A, . . . , G 34 are atomic sentences or sentence letters (or ¬ ) forms a . . . It corresponds roughly to the English phrase . . . (or ) forms a . . . The two sentences it connects are . . . It corresponds roughly to the English term . . . forms

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## This note was uploaded on 01/25/2012 for the course PHIL 201H1F taught by Professor Derekallen during the Fall '10 term at University of Toronto- Toronto.

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MIT24_241F09_handout02 - Logic I Fall 2009 Session 2...

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