>However, since the overlap between two generation's cognitive prime age is narrow, not every thought, intuition, idea is passed along well enough. The overlap

>However, since the overlap between two generation's cognitive prime age is narrow, not every thought, intuition, idea is passed along well enough. The overlap is perfect and zero at the same time as "generations" are a descriptive simplification rather than a reflection of reality. Every year people are born whose overlap with the people the year before is off by just one year (more or less). A new PhD student learns from his peers a year further along as well as from the post-doc 5 years ahead and the professor 10 years ahead.