Even if `pip` is installed, it doesn't solve the problem of reliable reproducibility, because `pip install <identifier>` doesn't have deterministic results, it

Even if `pip` is installed, it doesn't solve the problem of reliable reproducibility, because `pip install <identifier>` doesn't have deterministic results, it behaves differently based on arbitrary, implicit, and un-documented host-specific properties -- like, which version of python is used, which set of dependencies are used, etc. And what the hell is conda?