Of course we can't prove anything about possible future non-human brains, but try to think about it this way. Is there a limit to the number of consequences th

Of course we can't prove anything about possible future non-human brains, but try to think about it this way. Is there a limit to the number of consequences that a single action can have? If you think about all possible future consequences, then the answer is clearly no. Using an example from another comment, opening a closed door could bring you to your death, which has infinite consequences for your (potentially future) family. Therefore, if rationally analysing each possible consequence takes any non-zero amount of time, deciding any action rationally would take an infinite time. You could try to rationally decide what is the maximum amount of time you can spend on each choice, but deciding that amount rationally would require infinite time. This isn't a proof, but this consideration comes from spending a lot of time thinking about rationality and AI.