The answer should not stop with "I don't know" for someone with experience and expertise. He should be able to suggest the important trends at work, key events

The answer should not stop with "I don't know" for someone with experience and expertise. He should be able to suggest the important trends at work, key events that if they occurred would be significant, and developments that have already occurred but whose full effects have not been felt. It's not as important to predict exactly as to identify key drivers, trends, and dynamics. As to the unlearning aspect, I think it's a question of letting go of internal mental constraints imposed by prior limits that have been obsoleted by new developments. Jeff Bezos has suggested Amazon focuses on "invariants" or things that are going to continue to be true for a broad range of potential futures.