This is...

This is, necessary, because if, either the axiomatic material or the reasoning methods have the slightest uncertainty about them, the conclusions attained would be uncertain, and the theoretical problem under consideration would retain its peculiar complexity ambiguity even though a partial aspect of it may be clarified. Thus one cannot rely on conjecture, analogy, imagination or fantasy and the like, either in regard to the axiomatic material or in regard to the method of reasoning.

The only thing that can be relied upon is pure reason. Discussion about the primary axiomatic material and the method of…