You're describing the difference between fluid and crystallized intelligence. the first one peaks at age ~20, the second one peaks at age ~50: https://en.wikip

You're describing the difference between fluid and crystallized intelligence. the first one peaks at age ~20, the second one peaks at age ~50: https://en.wikipedia.org/wiki/Fluid_and_crystallized_intelligence https://en.wikipedia.org/wiki/Fluid_and_crystallized_intelli...