Here's a page about something that's probably going to contradict itself.
Quantum mechanics is all about things being in multiple places at once, so you can't even be sure what's on this page or not. Maybe it's here. Maybe it's not.
We're going to try to make sense of it, but it might just be double-thinking us.
Or maybe we're just not thinking of it. Maybe we're just quantum-not-thinking it.
Either way, it's going to be a wild ride.
See also: Many Paradoxes, More Paradoxes.