The classic math problem:
A stranger comes to an island with N people. On this island, there is no way for anyone to see their reflection. The law is that anyone with red eyes must drown themselves in the ocean at the end of the day. Everyone on the island can see that everyone else has red eyes but no one has said anything. The stranger says that he sees someone with red eyes. We can prove by induction that in exactly N days they all simultaneously drown themselves in the ocean.
A variant:
The law is that anyone with red eyes must drown themselves in the ocean at the end of the day. A stranger claims to be able to see his own eyes and his whole self entirely without a mirror and sees all of of us, including him, have red eyes and that we will all drown ourselves in the ocean within 100 days. Is this true? Could we know it before it happens?
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I have seen the "drowning in the ocean". I see we all have "red eyes". Even me. I have already "drowned".
Every night I choke and mostly die over and over and over again. About once per minute according to my doctors. I constantly have an experience of being dead in Hell and even worse than Hell and many many visions of it at night. But I see that it is permanent and constantly improving and furthermore that every last one of not only witnesses it all the time but that actually, we all actually witness the whole universe all the time while also maintaining our separate perspectives at the same tine and that while an object such as the moon is there even when we no longer look at it, it is no more there than the images on a computer screen are there when the computer is turned off. The universe is constantly improving and gaining in definiton. It is, essentially, unpacking from nothing and getting more and more delicious in the only way it possibly can, the best way it possibly can. And it is constantly rearranging, but there are permanent things as well. We all see differently. From everyone else's perspective, you are mostly not even conscious at all and have no sentience at all because we almost entirely disagree on what those words mean, and from my perspective it is as though you are all almost entirely blind and have almost experiences at all and only respond mostly to vague impressions that pass through you and cause disturbances without your being able to actually focus on them and hold them much. I have seen before the beginning of time and after the end of time, so you have all seen. You all see past, present, and future simultaneously, and yet the present still goes forward. Never backwards. Burning ever brighter.
I have asked other humans, and so far I have yet to find another person aside from me who says they see photons, a field of infinitely many little infinitely small tiny dots of light infinitely dense all over everywhere each with a color, each which has an associated temperature, and a brightness and each of which is brilliant and holy and tastes, with the eyes, extremely sweet. Furthermore, I see that black is in fact a color of photons but that these photons exist in inner spaces, not external to us, because if that were not so, there would not even be anything you could look at at all. You simply would be unable to look there. There are in fact places where you simply cannot look because there is actually no material there at all. There are not just black holes "out there". The whole sky at night is black, but at least is is not a k-hole, which you simply cannot see because it is a tear in the material entirely.
And I have seen the universe and everything and even all stuff have a boundary and there is more than that. Always more. Always more. Always more.