This is pretty interesting. Although prior knowledge and experience can be helpful in problem solving, it can also get in the way of better ideas because we just can't seem to think around what we already know.
"The difficulty lies, not in the new ideas, but in escaping from the old
ones, which ramify ... into every corner of our minds."
John Maynard Keynes
This is helpful as well: http://dspace.brunel.ac.uk/bitstream/2438/2276/1/Einstellung-Cognition.pdf 04-11-2014 5:17pm