ABSTRACT
If we ask for the justification of such views, a most plausible line of argument is offered, which seems to cut off all further dispute ab initio. However one may define logic as a technology – as a technology of thinking, judging, inferring, knowing, proving, of the courses followed by the understanding in the pursuit of truth, in the evaluation of grounds of proof etc. – we find invariably that mental activities or products are the objects of practical regulation. And just as, in general, the artificial working over of a material presupposes the knowledge of its properties, so this will be the case here too, where we are specially concerned with psychological material. The scientific investigation of the rules according to which this stuff should be worked over, naturally leads back to the scientific investigation of these properties. Psychology therefore provides the theoretical basis for constructing a logical technology, and, more particularly, the psychology of cognition.2
