Other members of the Circle (including Schlick, Rudolf Carnap, and Herbert Feigl) also spoke with Wittgenstein, but not to Waismann's extent.
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Born in Vienna, Waismann was educated in mathematics and physics at the University of Vienna.
Open texture is a term in the philosophy of Friedrich Waismann, first introduced in his paper Verifiability to refer to the universal possibility of vagueness in empirical statements.
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