|Interpretation: A) making statements about other statements, whereby the new statements of the vocabulary make use of the original statements and possibly introduce new vocabulary. If no new vocabulary is introduced, new information can be obtained by changing the syntactic elements.|
B) In logic, the insertion of values (objects) instead of the constants or free variables.
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Interpretation: their objects are not representations but propositional attitudes, speech acts, etc. -
J. Fodor/E. Lepore
Holism Cambridge USA Oxford UK 1992