Intuition. Gut feel. Whatever one might call it.
Intuition is what one feels about something from within without himself knowing why he feels so.
I read today in an article that intuition may not be a purely out-of-the-blues-I-feel thing. A research shows that intuition can be domain-specific, i.e. one can be very intuitive about one thing but blank on another topic. I too have observed the same.
Intuition is about the brain’s ability to pick up on certain recurring patterns; the more we are exposed to a particular domain of activity the more familiar we become with the relevant patterns.
So, intuition after all is not as unconscious a thing as it looks like. It, in fact, looks like the involuntary background work of one’s brain before yielding a decision based on past occurrences.