That didn't work out so well.

Exactly.

The general approach is to use interpretable models where you can understand how the model works and what features it uses to discriminate, but that doesn't work for all ML approaches (and even when it does our understanding is incomplete.)

Unless you're in Tibet, Xinjiang, or another place observing UTC+8 with a significant offset from local solar time.

They also make NEMA plugs with threaded rings around the boot for applications in marine and other harsh environments.

I've had great luck with Upton teas for the past decade or more in the US. Great selection, teas at multiple price points from broken leaf to first flush single estate.