This is a Tom thought.
It’s not an “A or B” universe. It’s and “A and B” universe from the right perspective.
Like the old classic, Flatland. Beings living in two dimensions cannot comprehend the impact of a third dimension. Yet that third dimension exists.
Look for the “and”. Even if your search turns up nothing, don’t assume the “and” doesn’t exist. It may be there and you are unable to see it.
“Absence of evidence . . .” and all that.