It's the tree falling in the woods argument isn't it, and it can't be proven either way. Does reality exist if there's no-one there to see it? Does our own personal reality cease when we do? At which point it becomes a faith-based decision. I happen to believe that my particular dimension of this reality ceases to exist when I do, even if the echoes of it's intersection with others go on.

So I guess I'm agreeing in principle: *a* reality exists, but since my intersection with it is all I ever get to experience, in any scenario that matters *my* reality ceases to exist when I do.