Could you put each sentence into plain English?
"One of the problems in designing a really smart thinking computer, as distinct from a super-computer, is that we would probably not believe the conclusions and decisions that the machine eventually puts before us. That computer would have to be smart enough to realize that those around were not so smart and therefore needed all the steps to the conclusion laid out in the open.
In our thinking culture we have always regarded intelligence much as I have been here treated the 'smartness' of that new thinking computer. Intelligence has always been enough. If you have a high intelligence, it will all happen in your head. This is an unfortunate fallacy that has had two disastrous consequences in education."