Intuition:

Genius, Hans Eysenck:

"My own definition would run something like this: Intuition is a mode of cognitive functioning located at the opposite end of a continuum from logical thinking, characterized by speed and suddenness of reactions (aha! experience), small number of relevant facts known or considered, feelings of certainty about the conclusion reached, reliance on unconscious (non-verbalizable) processes, not following the rule of Aristotelian logic, and relying in unusual associations and analogies."