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In the ''Tractatus Logico-Philosophicus'' of Ludwig Wittgenstein, Proposition 6.5 seeks to ground his philosophy of action (Proposition 7: ''"Whereof one cannot speak, thereof one must be silent"''). *6.5 "For an answer which cannot be expressed, the question too cannot be expressed. :"The ''riddle'' does not exist. :"If a question can be put at all, then it ''can'' also be answered. Although the historical significance of ''Tractatus'' is for its influence on the philosophers of logical empiricism, by providing them with a framework for a philosophy of science, and hence engineering, Wittgenstein actually wrote it as a work on ethics. See his propositions 6.4 onward. But his motivation for writing, and the style of presentation, follow Frege and Russell, below. ==Tractatus 1-2== *1 "The world is all that is the case. *1.1 "The world is the totality of facts, not of things. These famous propositions, starting from 1, and ending at 7, are striking for their simplicity and ambition. Proposition 6.5 (and its consequence) can not be understood until one realizes that Wittgenstein was a son of a family at the apex of Viennese culture, the capital of an empire (now vanished). In today's terms, the answer 6.5 is that from a man who some might view as possessed of the highest intellect, moral discrimination, and worldly wealth. He literally could do anything he wished. But his father, Karl, thought him untalented, in comparison to the rest of the family, which included musicians, and artists. He was schooled at home until age 14 (he later imposed his ideals on his hapless students after he had completed ''Tractatus'', and had undertaken training as a schoolteacher (1920)). He was assigned to study engineering and undertook the curriculum of a mechanical engineer at Berlin Technische Hochschule (1906). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tractatus Logico-Philosophicus (6.5)」の詳細全文を読む スポンサード リンク
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