chapter  1
I THE PRINCIPLE OF SIMPLICITY (I) Introduction
Pages 37

THE important role played by the principle of simplicity as an adjudicator between rival scientific theories has been widely acknowledged. The principle of simplicity may be said to enjoy the most universal approval of all the principles to be dealt with in this book. There seems to be complete agreement between philosophers that it is one of the basic rules of scientific methodology not to multiply unnecessarily the entities admitted into one's theories, and to choose always the simplest of alternative hypotheses.