2. The annual rainfall in California’s north valley averages twenty-three inches. So the rainfall next year will be twenty-three inches. The conclusion is probably true because it is likely that the rainfall could be twenty-three inches next year because of the stated premise. 3. You expect to get forty miles to the gallon in that? Why, that old wreck has a monster V8; besides, it’s fifty years old and needs an overhaul. The conclusion is possibly true because the premises are valid; therefore it is likely that the age of the vehicle and the size of the engine may reduce the amount of miles to the gallon. 4. In three of the last four presidential races, the winner of the Iowa Republican primary has not captured the Republican nomination. Therefore, the winner of the next Iowa Republican primary will not capture the Republican nomination. The conclusion is possibly true because it may be the case that the outcome of the Republican nomination may be the same. There is no way to prove for certain that the
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This note was uploaded on 05/12/2010 for the course GENERAL 9898 taught by Professor Meme during the Spring '10 term at École Normale Supérieure.