Hypotheses non fingo

Hypotheses non fingo (in Latin 'I do not compose a hypothesis') is a famous phrase used by Isaac Newton in his essay General Scholium, which was published in the second edition of his Philosophiae Naturalis Principia Mathematica.

It was his response to those who had challenged him to give an explanation of the causes of gravity instead of giving only the mathematical principles of kinetics. Next to Occam's razor, Newton's quote can be considered a distancing from the Aristotelian concept of natural philosophy.

wiki