Disproof quotes

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Karl_Popper

No Conclusive Disproof

“No conclusive disproof of a theory can ever be produced; for it is always possible to say that the experimental results are not reliable.”
  • Source: Popper, K. R. (2005). The Logic of Scientific Discovery | 1935 (1935/Epub ed.). New York, NY: Routledge. Chap. 2

Strict Proof

“If you insist on strict proof (or strict disproof) in the empirical sciences, you will never benefit from experience, and never learn from it how wrong you are.”
  • Source: Popper, K. R. (2005). The Logic of Scientific Discovery | 1935 (1935/Epub ed.). New York, NY: Routledge.

Alfred_Russel_Wallace

Truth Proof

“There is no more convincing proof of the truth of a comprehensive theory than its power of absorbing and finding a place for new facts, and its capability of interpreting phenomena which had been previously looked upon as unaccountable anomalies. It is thus that the law of universal gravitation and the undulatory theory of light have become established and universally accepted by men of science. Fact after fact has been brought forward as being apparently inconsistent with them, and one after another these very facts have been shown to be the consequences of the laws they were at first supposed to disprove. A false theory will never stand this test. Advancing knowledge brings to light whole groups of facts which it cannot deal with, and its advocates steadily decrease in numbers, notwithstanding the ability and scientific skill with which it may have been supported.”
  • Source: Alfred Russel Wallace, From a review of four books on the subject 'Mimicry, and Other Protective Resemblances Among Animals', in The Westminster Review (Jul 1867), 88, 1. Wallace is identified as the author within the article as reprinted in William Beebe, The Book of Naturalists: An Anthology of the Best Natural History (1988), 108.