"I have just my experience to go on. Some places, there can be more of one than the other, probably balancing on other axes I cannot really identify. Very rare there is just one and not the other. Some that could be mistaken for worlds that are just one. But the other is just...faint. Forgotten. But you hear echoes if you know how to listen." A shrug. "Just as easy to surmise it's all the same thing, just operating by different rules in each place."