|Logic: logic is the doctrine of the admissibility or inadmissibility of relations between statements and thus the validity of the compositions of these statements. In particular, the question is whether conclusions can be obtained from certain presuppositions such as premises or antecedents. Logical formulas are not interpreted at first. Only the interpretation, i. e. the insertion of values, e.g. objects instead of the free variables, makes the question of their truth meaningful.|
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|Horwich I 404
David Finkelstein / logic / Modern Physics / non-standard Qantum mechanics / Putnam: Finkelstein thesis:
1st There are premises, which are incompatible with any other given proposition. - 2nd there is not "the" negation of a given proposition.
P. Horwich (Ed.)
Theories of Truth Aldershot 1994