[TopHand]

Tacit knowledge is what I've always thought of as "intuitive feel". As you grow in experience in a field, you start getting this feel for what will work and what won't work. This can be a great advantage, or a great disavantage. I had occasion to work with a fairly bright scientist. He said the reason that most great discoveries were made by relatively young people is because they hadn't developed these prejudices yet, so were unaware that it wasn't suppose to work this way.