142 SCIENCE AND METHOD. 



form its toundation. Definition by example is always 

 necessary, but it must prepare the logical definition 

 and not take its place ; it must at least make its want 

 felt in cases where the true logical definition cannot be 

 given to any purpose except in higher education. 



You will understand that what I have said here in 

 no sense implies the abandonment of what I have 

 written elsewhere. I have often had occasion to 

 criticize certain definitions which I advocate to-day. 

 These criticisms hold good in their entirety ; the 

 definitions can only be provisional, but it is through 

 them that we must advance. 



