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Senseless/senseless sentences/negation/Image/Millikan: here there is the same problem (as with > facts):
E.g. "Gold is not square". The sentence is not true because gold has a form other than square.
Problem: the corresponding affirmative sentences have no meaning either!
Nevertheless, e.g "gold is not square" seems to say something true.
Problem: again, if "not" has a function other than in representative sentences, we must still explain this function.
2. Problem: (more important): the mapping rules between simple sentences of the form "x is not " and its real value.
Real value/Negation/Millikan: is the real value of a negative sentence the world state? E.g. The fact of John's not-being-tall? Or a precise fact like John's exactly-being-180-tall?
Millikan: the latter is correct.
R. G. Millikan
Language, Thought, and Other Biological Categories: New Foundations for Realism Cambridge 1987