This definition strives to include everything that exists, except the whole of the universe itself. If you will, the universe is the box (or the chessboard
) and things that exist are in the box. Existence is defined
in terms of the box, so including the box itself in the definition seems to me a bit problematic, because if you say "the universe exists" someone could say "exists
in what? exists
where?". Well, there is no answer to that. And I consider those questions axiomatic to existence.
I
think this covers everything we can ever consider to exist. What do you think?