Crystallized Intelligence Is a Hybrid

crystallized intelligence helps you make sense of abstractions fluid intelligence peaks around the age of 20 and then declines but it declines largely due to inactivity okay so that's important. by the time you reach the age of 25 your brain is basically fully formed and large-scale neuroplasticity development ends. If you're under 25 the more work you do now the better you are setting yourself up for future self because if you're post-25 now what you're doing is ameliorating decline and consolidating your experience.