Language, Truth, Logic, the theory's most prominent defender: “We say that a sentence is factually significant to any given person, if, and only if, he knows how to verify it the proposition which it purports to express – that is, if he knows what observations would be lead him, under certain conditions to accept the proposition as being true or reject it as being false” (16). In other words the meaning of a proposition lies in its method of verification. The verifiability principle thus imposes a standard…
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