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verificationist: phenomenalism, behaviorism, instrumentalism or positivism, intuitionism.
Topics: mostly evolve around the question of the existence of certain entities.
Thus, the phenomenalists deny the existence of physical, external objects as the actual constituents of reality.
Realism: Caution: for the realist, the recognizability of what makes our sentences true or false is absolutely irrelevant. Our sentences are true or false on the basis of an objective reality that exists independently from us.
(> Seel: the realist cannot make the nature of the world dependent on our knowledge. Therefore he cannot claim to know how the world is made at its heart of hearts.)
1) Objectivity thesis: Meaning is something objective.
2) Truth condition thesis: "understanding a sentence means to know its truth conditions, i.e. knowing that the sentence is true if this or that is the case.
3) Realism thesis: every sentence has a certain truth value.
Undecidable sentences: The understanding of such a sentence can therefore not manifest in linguistic practice.
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EMD II 102
Realism/Dummett: sentences that are neither true nor false are no problem: just multi-valued logic - problem: in principle undecidable sentences - then the principle of bivalence is not assertible.
Ursprünge der analytischen Philosophie Frankfurt 1992
Wahrheit Stuttgart 1982
G. Evans/J. McDowell
Truth and Meaning Oxford 1977
The Varieties of Reference (Clarendon Paperbacks) Oxford 1989