Freges Kriterien der Sinngleichheit

Archiv für Geschichte der Philosophie 98 (4):395-432 (2016)
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Frege's mature writings apparently contain two different criteria of sense identity. While in "Über Sinn und Bedeutung" (1892) and in "Kurze Übersicht meiner logischen Lehren" (1906?) he seems to advocate a psychological criterion, his letter to Husserl of December 12, 1906 offers a thoroughly logical criterion of sense identity. It is argued that the latter proposal is not a "momentary aberration", but rather Frege's official criterion; his psychological criteria only serve as a way of illustrating questions of sense identity by appealing to the thoughts of completely rational thinkers.

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Thorsten Sander
University of Duisburg-Essen


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