| http://www.w3.org/ns/prov#value | - In other words, to use the hackneyed example, the a priori claim that Hesperus is Phosphorus, obviously needs to be seen in order to be learned???it took empirical observation to see the morning star and evening star, and a very subtle astronomer to realize that they are the same entity, Venus???but the justification for the claim, i.e., the underlying substrata for its veracity, is a matter of, a
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