A multiverse of possibilities.
[The Universe:] AREA: Infinite - Bigger than the biggest thing ever and then some. Much bigger than that in fact, really amazingly immense, a totally stunning size, real "wow, that's big" time. Infinity is just so big that, by comparison, bigness itself looks really titchy. Gigantic multiplied by colossal multiplied by staggeringly huge is the sort of concept we're trying to get across here.
If recent cosmological theories are correct, someone else just exactly like you is also reading this right now.
I'm a Heinlein fan from way back, so I'm quite comfortable with the idea of a multiverse. In the Level IV case, I suppose it's even possible that Lazarus might be out there in the flesh. (Possible or mathematically certain?)
The TAG have spent a fair amount of time talking about resource identity. A multiverse has no practical bearing on the problem, but philosophically it tosses the whole notion into a cocked hat.