The opposition between intuitionism and empiricism in psychology and between intuitionism and analysis persists to the present day. In psychology, intuition had been concerned with the means by which that which is known comes to be known as opposed to questions of ultimate reality in philosophy. In kantian philosophy, there were innate categories of mind which forced particular categories of perceptual judgement. Also it held a priori knowings of truth - intuitions of such truths as the basic axioms of Euclidean geometry. The implicit metaphysical differences remain among pyschologists as they remain among philosophers: is there a reality to be discovered or are there multiple realities to be constructed ? Those who take successful probabilistic prediction as equivalent to knowledge would maintain that they never do know anything with certainity and indeed that one cannot know anything with certainty. On the other hand, harmonious certainty has been the hallmark of intuitionism for cen...