PHLA10H3 Chapter Notes -Color Blindness, Central Processing Unit, Reductio Ad Absurdum
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Y e p a g e | 1. 17: when is an idea or statement valid? (trick question) A statement or an idea cannot be valid; they can only be true or false. Being valid or invalid are properties of arguments, meaning that only they can be valid or invalid. Arguments can still be valid even if the premises or conclusions are obviously untrue, or if the premises and conclusion are all false. Invent an example of a valid argument that has false premises and a true conclusion. Invent an example of an invalid argument that has true premises and a true conclusion. If the dog is running, then the dog has four legs. For each of the invalid ones, construct an example of an argument with that form in which the premises are true and the conclusion false: (a) valid (b) invalid. If sam lives in wisconsin, then sam lives in the usa.
