If things can interact, how can we be sure that there is no information being passed around in it? Information processors might still arise, just computing over

If things can interact, how can we be sure that there is no information being passed around in it? Information processors might still arise, just computing over timescales unimaginable to us. By comparison, you might have information processors existing in the first second of the universe, celebrating for subjective aeons their low entropy compared to the frozen state that would exist fourteen billion years later.