In the lab the model runs perfect, and I start to trust it. Then we put the robot in a real room with real light and mess, and it does something dumb and dangerous. I've been burned enough times that I no longer believe a clean test, but I still have to ship.
More people experience this than they realize.
Your AI robots pass every test then fail in the messy real world.
If this sounds familiar, the Library can help you find the bigger picture.