Philosophy 1230A/B Lecture Notes - Lecture 24: Louis C.K., Propositional Calculus, Deductive Reasoning
25 Dec 2016
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Audio recording started: 9:32 am thursday, november 17, 2016. Sentential connectives: are used to clarify and represent these relationships. Symbolic logic: replace english language with plain symbols. Formal logic: dealing with arrangement of sentences, rather than content. Conditional: any time p is true and q is false, the statement is false. This is the only time you have a false conditional. Truth tables method: more precise method for searching for validity. Put 2^number of variables to determine number of rows. Rows: represent the way the world could be. Only 1 situation where conjunction is true: if all the conjuncts are true. Convention: the right variable alternates between t and f, the left variable you double up. Only way to have invalid argument: if all premises are true and the conclusion is false. Row 3: shows all true premises and a false conclusion. Audio recording started: 9:35 am friday, november 18, 2016.
