Logical Aliens? Eine Verallgemeinerung und Verteidigung der Psychologismus-Kritik Freges gegen Wittgensteins Naturalismus

Zeitschrift für Philosophische Forschung 76 (4):580-605 (2022)
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Abstract

The fundamental laws of logic hold independently of us. Thus, if there were beings who thought in contradiction to these laws, they would be in error. The paper defends this stance of Frege's against Wittgenstein's combination of logical constitutivism and logical naturalism. Frege's arguments against psychologism are more general than his usual wording suggests and are, at their core, directed against the whole of logical naturalism. Contrary to prevailing opinions on this subject, I argue that constitutivism alone cannot deflect Frege's attack. Rather, constitutivism is neutral to the opposition between logical realism and logical naturalism. The later Wittgenstein was not only a constitutivist, but, as will be explained, also a logical naturalist. By shedding new light on the logical alien problem, I attempt to apply Frege's generalized arguments to Wittgensteinian naturalism. This naturalism inevitably leads to a radical and self-undermining relativism.

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Ufuk Özbe
Universität Erlangen-Nürnberg

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