THE EXTERNAL WORLD 97 



known. Our hypothetical construction meets these 

 arguments, and shows that the account of the world 

 given by common sense and physical science can be 

 interpreted in a way which is logically unobjectionable, 

 and finds a place for all the data, both hard and soft. 

 It is this hypothetical construction, with its reconciliation 

 of psychology and physics, which is the chief outcome 

 of our discussion. Probably the construction is only in 

 part necessary as an initial assumption, and can be ob- 

 tained from more slender materials by the logical methods 

 of which we shall have an example in the definitions of 

 points, instants, and particles ; but I do not yet know to 

 what lengths this diminution in our initial assumptions 

 can be carried. 



