The hallmark of a successful theory is that it predicts correctly facts that were not known when the theory was presented, or, better still, which we… - Francis Crick

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The hallmark of a successful theory is that it predicts correctly facts that were not known when the theory was presented, or, better still, which were then known incorrectly. A good theory should have at least two characteristics: it should be in sharp contrast to at least one alternative idea and it should make predictions which are testable.

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About Francis Crick

Francis Harry Compton Crick (8 June 1916 – 28 July 2004) was a British physicist, molecular biologist and neuroscientist, most noted for being one of the co-discoverers of the structure of the DNA molecule in 1953.

Biography information from Wikiquote

Also Known As

Native Name: Francis Harry Compton Crick
Alternative Names: Francis H.C. Crick
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Additional quotes by Francis Crick

I argued that it was important not to place too much reliance on any single piece of experimental evidence. It might turn out to be misleading, as the 5.1 Å reflection undoubtedly was. Jim was a little more brash, stating that no good model ever accounted for all the facts, since some data was bound to be misleading if not plain wrong. A theory that did fit all the data would have been "carpentered" to do so and would thus be open to suspicion. (pp. 59-60)

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