04/03/2026
If youâre getting everything right, youâre probably not learning. đ
Thereâs a cool finding often called the 85% rule: for many learning tasks, progress is fastest when youâre accurate about 85% of the time, and you miss about 15%. That small, regular dose of âoopsâ is where your brain updates its predictions and gets sharper.
That 15% isnât failure, itâs friction.
Itâs the moment your brain goes:
âHuh. That didnât go so well.â
âŚand then quietly rewires a little bit so next time itâs closer.
No friction = no signal.
No signal = no change.
So if youâre learning something new and it feels slightly clunky, congrats, youâre in the zone.
(Nature, 2019)
https://www.nature.com/articles/s41467-019-12552-4