 Hume takes this supposition to license (in his own words, to provide the “foundation” for: compare  note 5  above) all inductive inferences from observed constant conjunctions, just as Newton takes the supposition that “nature is always simple and ever consonant with itself” to license the applications of his Rule 3. It appears very likely, therefore, that Hume takes this Newtonian supposition as the model for his own principle of the uniformity of  nature.[22]