| http://www.w3.org/ns/prov#value | - Here, I???m trying to rule out simple examples such as proving B directly versus proving a much stronger statement A and deducing B. Incidentally, the previous paragraph gives, I think, another way in which two proofs can be different: one proof may use axioms while the other uses a classification theorem and then verifies the statement for each example that comes out of the classification.
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