though without thinking myself very combative I will not refuse the challenge of discovering the fallacy in every such attempt of this kind, and so frustrate its pretensions; yet in this way the hope for better luck on the part of those who have become accustomed to dogmatic persuasion will never be fully done away with, and so I confine myself to one single fair demand: that one should provide a general justification, based on the nature of human understanding, together with all remaining sources of cognition, for making a start at extending one's cognition entirely a priori and stretching it a for sich selbst tauter