|Adequacy: in logic a complete and correct calculus is adequate - Empirical adequacy of statements can only be found in relation to theories (as opposed to truth).|
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Def Empirical Adequacy/Fraassen: there is a model, so that all phenomena can be identified with movements in the model (also historical, not perceived ones). - Def Empirically Equivalent: are two theories if they both have models that can do this.
Empirical Adequacy/Fraassen: is (unlike truth) a global property of theories - i.e. there is no general pattern of statements so that if all statements (propositions) of the theory each have this characteristic in themselves, then the theory is empirically adequate. - Since theories are families of models each of which has a particular family of substructures that correspond to possible phenomena (empirical substructures). - Problem: because the empirical meaning cannot be syntactically isolated, empirical adequacy must be defined directly without empirical detours. - Empirical adequacy of a single statement can only be determined in terms of a theory. - Problem: unlike truth, one theory may be empirically adequate and another may not. - Then a conjunction of theories must be treated differently than in the case of truth.
B. van Fraassen
The Scientific Image Oxford 1980