Hypotheses non fingo (Latin for "I feign no hypotheses," "I frame no hypotheses," or "I contrive no hypotheses") is a famous phrase used by Isaac Newton in an essay, General Scholium, which was appended to the second (1713) edition of the Principia. Here is a modern translation (published 1999) of the passage containing this famous remark: The nineteenth century philosopher of science, William Whewell, qualified this statement, as, he said, "it was by such a use of hypotheses, that both Newton himself and Kepler, on whose discoveries those of Newton were based, made their discoveries".