Answer_Key_test_1 - University of Toronto PHL 245 Modern...

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University of Toronto PHL 245 Modern Symbolic Logic Test 1 Instructor Sorin Bangu July 21 st , 2005 -- LM 159 45 minutes (8:10 – 8:55 PM) Worth 30% of the final grade. Answer all questions. Staple this page with your answers. Write your name and student # on every page you return. ANSWER KEY Note: the following answers are schematic and are meant to guide you to understand how to answer the questions. 1. True or false? Explain. a) All sound arguments are valid. ( 5 marks) Yes. It follows from the definition of soundness (sound = valid + true premises) b) There are sound arguments with at least one false premise. ( 5 ) False. See above. 2. Paraphrase, indicate the dictionary and then symbolize. ( 10 ) Either George doesn’t have a high cholesterol level or cholesterol is trapped in the walls of his arteries. If cholesterol is trapped in his arteries then plaque will build up, and with such a build up, he is a candidate for a heart attack. Hence George is a candidate for a
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Answer_Key_test_1 - University of Toronto PHL 245 Modern...

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