| Third, Carnap realizes that the principle of operationalism is too restrictive. |
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| Carnap was aware that the symbol N is definable only in the meta-language, not in the object language. |
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| A few years later, Carnap realized that this thesis was untenable because a phenomenalistic language is insufficient to define physical concepts. |
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| It's not so much that Popper disagreed with Carnap and other inductivists as that he restated their views in a bizarre and cumbersome terminology. |
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| The year 1940 was an exciting one for Quine at Harvard for in that year both Carnap and Tarski visited Harvard and the three debated logical positivism. |
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| The omega-rule, which Carnap proposed in The Logical Syntax of Language, has come into widespread use in metamathematical research over a broad range of subjects. |
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| In his autobiography, Rudolf Carnap describes Wittgenstein as the thinker who gave him the greatest inspiration. |
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