People can learn. So I've often wondered if the Peter Principle is more of a recognition that people stop learning as they get older. Seems like the data coul

People can learn. So I've often wondered if the Peter Principle is more of a recognition that people stop learning as they get older. Seems like the data could fit either scenario. People rise until their job requires more skills than they have, or people rise until they stop learning (or learn to stop learning, or until their learning capacity is reduced.) There's this thing that is called "growing up". Does growing up entail not being naive and an end to accepting what you are told (i.e., learning)? "They" say that when you're over 30 you are "over the hill". Has anyone ever tried to measure that? Maybe it's not a physical change in the body, maybe it's a consequence of getting hurt and learning not to be naive and accepting less teaching, being less open. If you've watched children grow up you can see them becoming more reticent and adopting postures.