The source is really the training data plus all code required to train the model. I might not have resources to "compile", and also "compilation" is not determi

The source is really the training data plus all code required to train the model. I might not have resources to "compile", and also "compilation" is not deterministic, but those are technical details You could have a programming language whose compiler is a superoptimizer that's very slow and is also stochastic, and it would amount to the same thing in practice.