"A system is said to be coherent if every fact in the system is related every other fact in the system by relations that are not merely conjunctive. A deductive system affords a good example of a coherent system."

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The weaker sex, to piety more prone, by rare examples, oft have been renown'd. When many murders were bewail'd by none, an isles whole men in blood by women drown'd.

— William Alexander, 1st Earl of Stirling