Rules for Demonstrations. I. Not to undertake to demonstrate any thing that is so evident of itself that nothing can be given that is clearer to prov… - Blaise Pascal

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Rules for Demonstrations. I. Not to undertake to demonstrate any thing that is so evident of itself that nothing can be given that is clearer to prove it. II. To prove all propositions at all obscure, and to employ in their proof only very evident maxims or propositions already admitted or demonstrated. III. To always mentally substitute definitions in the place of things defined, in order not to be misled by the ambiguity of terms which have been restricted by definitions.

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About Blaise Pascal

Blaise Pascal (19 June 1623 – 19 August 1662) was a French mathematician, logician, physicist and theologian.

Biography information from Wikiquote

Also Known As

Alternative Names: Pascal Louis de Montalte Amos Dettonville Dettonville Paskal Blez
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Additional quotes by Blaise Pascal

When I see the blindness and the wretchedness of man, when I regard the whole silent universe, and man without light, left to himself, and, as it were, lost in this corner of the universe, without knowing who has put him there, what he has come to do, what will become of him at death, and incapable of all knowledge, I become terrified, like a man who should be carried in his sleep to a dreadful desert island, and should awake without knowing where he is, and without means of escape. And thereupon I wonder how people in a condition so wretched do not fall into despair.

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