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Unformatted text preview: A, 3 card that you have to turn over. (If a card has a vowel on one side, it has an even number on the other side.) A is a real test, antecedent is true. 4 cards: everyone who drinks alcohol is over 21 years of age. Coke 16 Beer 24. If a person drinks alcohol, then they are over 21 years of age. Explain why card A and card 3 are the only ones necessary. Deductive and non-deductive Deductive: We assume all the premises are true (regardless of what is factual). Non-deductive: All the conditions are true, but the conclusion may not be true. Deductively valid, but the premises are false. Then the deductive argument is unsound. For every invalid argument, there is a story. Counterexample shows that its false. Modus Ponens, Modus Tollens 15:10 15:10...
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- Fall '07