such an intuition, merely experienced in exceptional moments, is that the intuition is thereby a function of these moments. Anything which explains the origin of such moments, in respect to their emotional accompaniments, can then fairly be taken to be an explanation of the intuition. Thus the intuition becomes a private psychological habit, and is without general evidential force. This is the psychological interpretation which is fatal to evidence unable to maintain itself at all emotional temperatures amid great variety of environment.
Here a distinction must be drawn. Intuitions may first emerge as distinguished in consciousness under exceptional circumstances. But when some distinct idea has been once experienced, or suggested, it should then have its own independence of irrelevancies. Thus we may not know some arithmetical truth, and require some exceptional help to detect it. But when known, arithmetic is a permanent possession. The psychological interpretation, assigning a merely
