[badloginagain]

They talk about black holes being possible in AdS universe- in the Escher universe does that look like a group of the fish "missing"?

Also, near the end they get into black hole information preservation. What information are they referring to? My assumption has always been that black holes essentially zero out all information, like making all bits zero on a hard-drive.

[hammock]

Maybe a black hole looks similar to the boundary, but instead centered on a single point- the fish closest to the point getting smaller and smaller.