Craig’s theorem (1953).
Proof concerning the formal description of scientific theories, expounded by William Craig.
According to Craig, a formal expression of a scientific theory is divisible into ‘theoretical’ and ‘observational’ vocabularies, and (since the ‘observational’ terms are all deducible) it follows that a description can be produced that consists only of ‘observational’ terms and in which all ‘theoretical’ terms are omitted (although he did not suggest that these were in fact undesirable).
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