Intuition:

"To link intuition with exactitude, correctness, precision or truth would be a mistake; intuition can be as wrong, treacherous, mistaken and erroneous as logical thinking; it is no guarantee of truth. The adjective 'intuitive' refers to the method of arriving at a conclusion; not any property of the conclusion itself. Intuition is the basis of the 'aha!' experience, but how many 'ahas' have had to be retracted?"

Genius - H. J. Eysenck