Principle used by the English economist John Maynard Keynes (1883-1946) in trying to justify induction.
It said that, if induction is to work, a complex change must be resolvable into a set of component changes each of which is separately attributable to some distinct feature of the preceding state of affairs.
Also see: INDUCTIVE PRINCIPLE
Source:
J M Keynes, A Treatise on Probability (1921), 249