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Objectivity in the strong sense (E.g. wavelength) must not be confused with actual existence: E.g. metaphysical assertion - E.g. that sugar is not sweet, would be even unjustified, if tastes were not objective in this sense.
Language: we can not start from the idea that our language has the opportunity to speak of a fixed, objective reality, as measured by what we say is true or false, regardless of whether we have a means of this truth or to recognize falsehood.
Ursprünge der analytischen Philosophie Frankfurt 1992
Wahrheit Stuttgart 1982