Wrongbot’s idea is probably that something “exists” only in relation to something else. So things beyond the Earth’s past and future light-cones don’t actually “exist” for us, though they exist for themselves, and similarly things in a mathematical model of a different universe exist in relation to each other, but not in relation to us...
Wrongbot’s idea is probably that something “exists” only in relation to something else. So things beyond the Earth’s past and future light-cones don’t actually “exist” for us, though they exist for themselves, and similarly things in a mathematical model of a different universe exist in relation to each other, but not in relation to us...