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|Logical Truth||I 123
logical truth / Field: if it obeys a strong modal logic, one is not obliged to give evidence concerning logical knowability - logical truth is inseparable from logical knowability! - We considered the case when statements such as M (NBG) are logically true (only for Field, KripkeVs) then they can not be known logically.
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