That's also sort of missing the entire goddamn point of functional programming. The point of functional programming is that functions produce the exact same thi

That's also sort of missing the entire goddamn point of functional programming. The point of functional programming is that functions produce the exact same thing every time. That's why you don't have to evaluate them until the end value in the chain is needed, and why all state is nicely encapsulated elsewhere (e.g. in IO monad). If that state changes, the entire evaluation that leads to the final result needs to be re-done. It may represent a part of the overall evaluation. There are no ifs and buts here, even if you need a random number generator, you deal with it the exact same way.