PHLA10H3 Chapter Notes - Chapter 13: Parallel Postulate, Senses Fail, Empirical Evidence

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4 Apr 2016
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There are the foundaional beliefs, which are perfectly solid. There are the superstructure which count as knowledge because they rest securely on that solid foundaion. To show that a given body of beliefs counts as knowledge. First, idenify the beliefs that will provide the foundaions of knowledge. (these must be shown to have some special property, such as being totally beyond doubt) Second, we show that the rest of our beliefs count as knowledge because they bear some special relaionship to the foundaional items. If you have a straight line (call it s) and a point not on that line, then there is exactly one straight line that goes through that point and is parallel to s. This assumpion is less obvious to others. People tried to prove it from other axioms but failed to do so. This postulate is independent of other assumpions. Someimes isn"t so clear whether a given statement is obviously true to someone.

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