| http://www.w3.org/ns/prov#value | - Thus it is that when we say that the diamond is the hardest of all bodies, we mean of all the bodies with which we are acquainted, and we neither can nor ought to comprehend in this assertion those with which we are not acquainted; and when we say that gold is the heaviest of all bodies, we should be presumptuous to comprehend in this general proposition those which have not yet come to our knowle
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