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on science [Aug. 23rd, 2005|11:43 am]

THERE are of knowledge two kinds, whereof one is knowledge of fact; the other, knowledge of the consequence of one affirmation to another. The former is nothing else but sense and memory, and is absolute knowledge; as when we see a fact doing, or remember it done; and this is the knowledge required in a witness. The latter is called science, and is conditional; as when we know that: if the figure shown be a circle, then any straight line through the center shall divide it into two equal parts. And this is the knowledge required in a philosopher; that is to say, of him that pretends to reasoning.

Thomas Hobbes, "Leviathan", Ch 9.