The fundamental thesis of ordinary , represented for instance by Poincare, states that there are problems which cannot be solved by appeal to experience unless one introduces a certain convention, since only such a convention, together with experimental data, makes it possible to solve the problem in question. The judgements which combine to make up such a solution are thus not forced on us by empirical data alone, but their adoption depends partly on our recognition, since the said convention which co-determines the solution of the problem can be arbitrarily changed by us so that as a result we obtain different judgements.
Polish philosopher and logician (1890–1963)
(Dec. 12, 1890 – April 12, 1963) was a Polish philosopher and logician, a prominent figure in the Lwów–Warsaw school of logic. He originated many novel ideas in semantics. Among these was , a highly flexible framework for the analysis of natural language syntax and (indirectly) semantics that remains a major influence on work in formal linguistics. Ajdukiewicz's fields of research were and the philosophy of science.
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If he [the metaphysician] takes an empiricist position in regard to the source of knowledge and a realist one in regard to the limits of knowledge, he will see no need or even possibility of seeking a world-view other than that provided by science as based on experience. If he inclines towards an aprioristic position, or even more, if he is convinced by the arguments of irrationalists, he will seek his world-view in an aprioristic way, or he will appeal to intuition or mystical experience
According to Husserl, that 'act of meaning', or the use of a given phrase as an expression of a certain language, consists in the fact that a sensory content appears in consciousness, by means of which one might think visually about that phrase, should that content be joined by an appropriate intention directed to that phrase. But when a given phrase is used as an expression belonging to a certain language, then that sensory content is joined by another intention, not necessarily a representative one, which is however in principle directed to something other than that phrase itself. Together with the sensory content in question, that intention makes up a uniform experience, but neither the experiencing of that sensory content, nor that intention is a complete, independent experience. Both the one and the other are non-independent parts of the experience as a whole. The meaning of a given expression (as a type) would be, according to Husserl, the type under which that intention joined to the sensory content must fall if the given phrase is to be used as an expression belonging precisely to that language
However, the voice of the rationalist is a sound social reaction, it is an act of self-defense by society against the dangers of being dominated by uncontrollable forces such as a saint proclaiming a revelation or a madman affirming the products of his sick imagination, and finally a fraud who wants to convert others to his views for the sake of his egoistic and unworthy purposes. It is better to rely on the safe but modest nourishment of reason than, in fear of missing the voice of ‘Truth’, to let oneself be fed with all sorts of uncontrollable nourishment which may more often be poisonous than healthy and beneficial.