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12:22 More Proofs Using Subproofs More Proofs Using Subproofs	More Proofs Using Subproofs Dr. Smith works through two more examples of proofs using the subproof method. phil 2303 logic proof assumption introduction premise lines contradiction negation subgroup conclusion elimination b. thing statement bit opposite conjunction side antecedent alright disjunction From Nathan Smith 0 likes 0
24:43 UsingTruthTables UsingTruthTables	UsingTruthTables This video shows how to use truth tables to assess logical concepts such as tautology, contradiction, contingency, logical equivalence, consistency, and validity. phil 2303 logic truth table sentence sentences values conclusion rows argument premises conjunction letters thing t. scenario negation row app tables ball box From Nathan Smith 0 likes 0
23:25 Truth Tables for the Logical Operators Truth Tables for the Logical Operators	Truth Tables for the Logical Operators This video explains the truth tables for each of the five operators in sentential logic. philosophy phil 2303 logic water statement cows truth operators party scenarios field sentence scenario negation coop hens table teapot claim components china fact From Nathan Smith 0 likes 0