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Using the techniques from the chapter, determine whether the following is valid or invalid: "All men are mortal. Socrates is a man. Therefore, Socrates is mortal." |
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Using the techniques from the chapter, determine whether the following is valid or invalid: "There's never been a car that could fly. Flying things are all made of aluminum. So nothing made of aluminum is a car." |
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Using the techniques from the chapter, determine whether the following is valid or invalid: "Some harmonica players are also ventriloquists. Harmonica players love to perform on the radio. So some ventriloquists love to perform on the radio." |
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Using the techniques from the chapter, determine whether the following is valid or invalid: "Cats are not friendly animals. Friendly animals respond to the sound of their names. So no animal that responds to the sound of its name is a cat." |
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Using the techniques from the chapter, determine whether the following is valid or invalid: "Gloves are not essential to life. After all, Plato's Republic mentions all of life's essentials, and it has nothing to say about gloves." |
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Using the techniques from the chapter, determine whether the following is valid or invalid: "You'll find that all statisticians are professionals. After all, no nonprofessional is employed by this company; and everyone employed by this company is a statistician." |
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Using the techniques from the chapter, determine whether the following is valid or invalid: "All educated people respect books. Some bookstore personnel are not truly educated. So, some bookstore personnel don't respect books." |
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