Books on Amazon
Logic/Theory/Field: concepts such as negation, conjunction, implication do not require any theoretical access (like e.g. "light is electromagnetic radiation") - because they are logical concepts.
Logic/mathematics/mathematical entities/m.e./VsField: one needs mathematical entities in logic, albeit not in science. - FieldVsVs: this is a confusion of logic and meta-logic. - E.g. for definitions in model theory.
In logic, which is simple reasoning, we need only the entities that occur in the premises, the intermediate steps, and the conclusions, but because we ultimately draw nominalistic conclusions, we need no mathematical entities in the conclusions. - We are talking about the predictions of empirical consequences.
Definition Logic/Field: is the science of the possible.
Realism, Mathematics and Modality Oxford New York 1989
Truth and the Absence of Fact Oxford New York 2001
Science without numbers Princeton New Jersey 1980