natural deduction

British  

noun

1. a system of formal logic that has no axioms but permits the assumption of premises of an argument. Such a system uses sequents to record which assumptions are operative at any stage Compare axiomatic

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Example Sentences

There are a great many full-page plates of nests and eggs in their natural situations.

From The Bird Book Illustrating in natural colors more than seven hundred North American birds; also several hundred photographs of their nests and eggs. by Reed, Chester A. (Chester Albert)

With the end of the Spanish power the centres of importance—hitherto quite arbitrarily and artificially chosen—tended to drift to their natural situations.

From South America by Koebel, W. H. (William Henry)

It presents interesting figures, natural situations, and warm colors.

From The Easiest Way in Housekeeping and Cooking Adapted to Domestic Use or Study in Classes by Campbell, Helen

Vividly natural situations are here detached from daily life and delineated with intensity of passion, vehement sincerity.

From Renaissance in Italy: Italian Literature Part 1 (of 2) by Symonds, John Addington

The parties in the great game were drifting into their natural situations.

From The Divorce of Catherine of Aragon The Story as Told by the Imperial Ambassadors Resident at the Court of Henry VIII by Froude, J.A.