And whereas sense and memory are but knowledge of fact, which is a thing past and irrevocable, science is the knowledge of consequences, and dependence of one fact upon another; by which, out of that we can presently do, we know how to do something else when we will, or the like, another time: because when we see how anything comes about, upon what causes, and by what manner; when the like causes come into our power, we see how to make it produce the like effects.

Thomas Hobbes (1588-1679) English philosopher
Leviathan, Part 1, ch. 5 (1651)
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Added on 8-Jan-14 | Last updated 6-Nov-20
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