The correct assumption is that what individuals have learned by age twenty-one will begin to become obsolete five to ten years later and will have to be replaced-or at least refurbished-by new learning, new skills, new knowledge.
Peter DruckerTeaching 23-year-olds in an MBA programme strikes me as largely a waste of time. They lack the background of experience. You can teach them skills - accounting and what have you - but you can't teach them management.
Peter Drucker