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n4reference.
provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
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prov:value
To start with, we shall concern ourselves with the simplest two judgments A is a proposition and A is true, abbreviated as A prop and A true respectively.The judgment A prop defines the structure of valid proofs of A, which in turn defines the structure of propositions.
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