“ The "real world" is a construct, and some peculiarities of scientific thought become more intelligible when this fact is recognized ... Einstein himself in 1926 told Heisenberg it was nonsense to found a theory on observable facts alone, saying "In reality the very opposite happens. It is theory which decides what we can observe." ” - D. O. Hebb

Research.  Stages/Tasks.  Vaillant.  Kohlberg.  Adult "maturation tasks".  Retirement.  Death.