I think intuition is a matter of someone's picking up (without always even realizing it, or something out-and-out knowing one has learned or experienced something) bits and peaces of information, clues, "vibes", patterns, and any number of other types of information we can take in without really always noticing it. Then I think that information gets stored somewhere other than "the front of the mind". It's from that, though, that we feel as if we "have a feeling" about something. I think it's just kind of a "bank" of all kinds of information, patterns, events, etc. that we all have; although I think some people are more likely to trust their intuition than others. Maybe some are just better at knowing how to use it, or knowing how to interpret the sometimes not-so-obvious stuff that goes into a sense of intuition.