@dalias @felipe @zak @futurebird @ronaldtootall @hannu_ikonen They do and are though.
That's the training part. The model is trained and then used. It may or may not be training while it's used.
That training is fed a context, just like you do with experimentation. The model it tested against that context, as you do empirically. The model is then adjusted if it needs to be. This is exactly the empirical process.