Overkill

Katrina Owen talks about Tony Plog who runs a master class for soloist musicians. In a class he asked a group to play a beginner warm up exercise. When Tony played it, it sounded beautiful and graceful.

There's a profound difference between the true master and the skilled practitioner.

The advanced student should spend far more time practicing simple pieces intensely.

This is mostly a plug for exercism.io for the rest of the talk, and it's really quite cool.

Sleeper Bug - Fragile code that works, but breaks the basic expectations that people have about it. If reused in the future, is likely to have unexpected behavior.