I think that's putting it a little too strong. For example, two fermions with identical quantum states (including spins) are incompossible, but that's not a batter of distinct realities but of being excluded (if you'll pardon the pun) from having the same quantum numbers.
Only one tennis ball can be at the bottom of the canister.
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Date: 2010-10-01 02:29 pm (UTC)Only one tennis ball can be at the bottom of the canister.
---L.