The system becomes more coherent as it is further extended. The elements which we require for explaining a new class of facts are already contained in our system. In false theories, the contrary is the case.

The system becomes more coherent as it is further extended. The elements which we require for explaining a new class of facts are already contained in our system. . . . In false theories, the contrary is the case.

It is a test of true theories not only to account for but to predict phenomena

We cannot observe external things without some degree of Thought; nor can we reflect upon our Thoughts, without being influenced in the course of our reflection by the Things which we have observed.

As a rule we disbelieve all the facts and theories for which we have no use.

There is a class, moreover, by whom all these scientific theories, and more are held as ascertained facts, and as the basis of philosophical inferences which strike at the root of theistic beliefs.