157

5

defining it in terms of those distinct conceptions which the inquiry itself develops.
At the outset, we define the principle purpose of logic to be to learn how to conduct any inquiry.
But we soon find that as a preliminary to that it is requisite to classify reasonings characterizing each class in such a manner that, in case of doubt, we can determine what the value of any reasoning is; and since such a classification is worth knowing in itself; whether we attain our ulterior purpose of learning how to conduct inquiries or not, this will constitute a secondary purpose of logic.
But before we have taken three steps toward attaining this secondary purpose, we find that nothing can be done until we have studied out the anatomy of reasonings and have found out what they are composed of.

Thus there will be three distinct divisions of logic which deal with different problems