In this context, learning something new is surprising.
> People do learn from mistakes.
Mistakes are surprises.
> Like I spend 90 minutes on lesson
Assuming this lesson is teaching you something you didn't know, that's the surprise.
> People do learn from mistakes.
Mistakes are surprises.
> Like I spend 90 minutes on lesson
Assuming this lesson is teaching you something you didn't know, that's the surprise.
There was some trick in calculus that makes it 1% more efficveint. Big deal but hardly surprise.