Hypotheses non fingo
In the history of physics, hypotheses non fingo (Latin for "I frame no hypotheses", or "I contrive no hypotheses") is a phrase used by Isaac Newton in the essay General Scholium, which was appended to the second edition of Philosophiae Naturalis Principia Mathematica in 1713. == Original remark == A 1999 translation of the Principia presents Newton's remark as follows: I have not as yet been able to discover the reason for these properties of gravity from phenomena, and I do not feign hypotheses.