SSH 105 Lecture Notes - Ryerson Rams, Critical Thinking, Counterexample
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26 Sep 2012
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To claim that something is true is to assert it. (asserting is not the same as supposing, considering, assuming, pretending that, etc) To assert is to claim that something is a fact or is true. Proposition: we use complete sentences to assert something. (make the claim that is true) Not every complete sentence can be used to make an assertion. (ex. These are used to ask questions or express support. They are not used to say something that is true or false. So, they are not used to assert something. To tell whether some proposition is asserted in a sentence, ask whether the sentence as a whole could be true even if that proposition were false. If yes, then that proposition is not asserted. A conjunction is a sentence with an and in it. (ex. A conjunction is true only when both of its conjuncts are true.