Most AI are deterministic, it’s only a small subset of AI that are non-deterministic, and in those cases it’s often by design. Also, in many cases, the AI itself is deterministic, but we choose to use the output in a non-deterministic way, e.g. the AI gives a probability output, and will always give the same probabiliies for the same input, and instead of always choosing the one with highest probability, we choose based on the probability weight, leading to a non-deterministic output.

Tl;Dr. Non-determinism in AI is often not an inherit property of the model, but a choice in how we use the model.

Comment should describe “why?”, not “how?”, or “what?”, and only when the “why?” is not intuitive.

The problem with comments arise when you update the code but not the comments. This leads to incorrect comments, which might do more harm than no comments at all.

E.g. Good comment: “This workaround is due to a bug in xyz”

Bad comment: “Set variable x to value y”

Note: this only concerns code comments, docstrings are still a good idea, as long as they are maintained