Something like knowledge - but just doesn't feel perfectly trustworthy .... might be how you would describe a hunch (see The Luck Factor by Max Gunther). Or you think you know - but you don't know how you know it. Max's advice is not to smother a hunch - which is what I do when I constantly drill Ellen with the comment "There must be a reason .......".
I'm not the perfect trivia guy when it comes to Star Trek - but I can't remember anytime that Spock had a hunch. Hunches are "just not logical" and they come in the form of feelings. So do some people have Hunching Skills - the ability to nurture a hunch and get the desired result?
I think so - but it's just a hunch :)