 And it's because of this thing that I also talk about in Fluke, which is this concept of lock-in, where an arbitrary thing can happen and then sometimes it persists and sometimes it doesn't. And that's often very random. And so I think this sort of concept of the arbitrary experimentation and superstition of the Romans and then getting locked in and the empire sort of sets it up and then it spreads and all that. And then you think, okay, why do we have a five-day working? I mean, it's partly tied to this superstition about the auspicious nature of the visible planets,