
Cognition & AI
Brains Improve by Deleting Stuff
Why pruning, compression, and developmental timing matter more than simply adding more — for kids' brains and smarter AI.
3 articles

Why pruning, compression, and developmental timing matter more than simply adding more — for kids' brains and smarter AI.

Around age two, you hit peak synaptic density. Then your brain spends the next two decades deleting connections on purpose. AI does the opposite — and that might be exactly the problem.

Adolescents forge identity through exploration, uncertainty, and genuine role confusion. AI character is built through RLHF — reward signals, annotator preferences, optimization. The parallel is illuminating. The difference might be everything.