| http://www.w3.org/ns/prov#value | - In the first sentence of an ancient book entitled ???On Truth,??? the famous Sophist Protagoras of Abdera sums up the relativistic view: ???Of all things the measure is man: of existing things, that they exist; of non-existing things, that they do not exist.??? Protagoras, like other Sophists, was a traveler and an astute observer of different cultures and customs as well as a renowned teacher of
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