152 THE PRINCIPLES OF SCIENCE. [CHAP. vii. 



1. Imperfect Induction entirely rests upon Perfect In- 



duction for its materials. 



2. The logical process by which we seem to pass directly 



from examined to unexamined cases consists in an 

 inverse application of deductive inference, so that 

 all reasoning may be said to be either directly or 

 inversely deductive. 



3. The result is always of a hypothetical character, and 



is never more than probable. 



4. No net addition is ever made to our knowledge by 



reasoning ; what we know of future events or un- 

 examined objects is only the unfolded contents of 

 our previous knowledge, and it becomes less pro- 

 bable as it is more boldly extended to remote 

 cases. 



