Philosophical Works

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"Hume's skepticism rests entirely upon his rejection of the principle of induction. ...If the principle is to be adequate, a sufficient number of instances must make the probability not far short of certainty. If this principle, or any other from which it can be deduced, is true, then the causal inferences which Hume rejects are valid, not indeed as giving certainty, but as giving a sufficient probability, for practical purposes. If this principle is not true, every attempt to arrive at general scientific laws from particular observations is fallacious, and Hume's skepticism is inescapable for an empiricist. The principle itself... must be, or be deduced from, an independent principle not based upon experience. To this extent, Hume has proved that pure empiricism is not a sufficient basis for science. But if this principle is admitted, everything else can proceed in accordance with the theory that all our knowledge is based on experience. It must be granted that this is a serious departure from pure empiricism, and that those who are not empiricists may ask why, if one departure is allowed, others are forbidden. These, however, are questions not directly raised by Hume's arguments. What those arguments prove - and I do not think the proof can be controverted - is that induction is an independent logical principle, incapable of being inferred from other logical principles, and that without this principle science is impossible."

- A History of Western Philosophy

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