The whole of moral philosophy, as it is now widely taught, rests on a contrast between statements of fact and evaluations. ... If a man is given good evidence for a factual conclusion he cannot just refuse to accept the conclusion on the ground that in his scheme of things this evidence is not evidence at all. With evaluations, however, it is different. An evaluation is not connected logically with the factual statements on which it is based. (Philippa Foot)

The whole of moral philosophy, as it is now widely taught, rests on a contrast between statements of fact and evaluations. ... If a man is given good evidence for a factual conclusion he cannot just refuse to accept the conclusion on the ground that in his scheme of things this evidence is not evidence at all. With evaluations, however, it is different. An evaluation is not connected logically with the factual statements on which it is based.

Philippa Foot

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