> can be developed through exercise or atrophy through lack of it. There's a personal upper limit that can be improved only when one is a child from what I've

> can be developed through exercise or atrophy through lack of it. There's a personal upper limit that can be improved only when one is a child from what I've read. Whilst at the same time, damaging one's cognitive intelligence is doable at any age, yes. And to some extent, undoing the damage You wrote elsewhere: > The book has an entire chapter called "Raising Cognitive Ability" Makes me interested in reading the book :-)