Many Worlds seems fake because doesn’t that imply the universe is tracking a complex number with magnitude in the order of 10^-10^100 for the branch that we live in? Since the worlds have to split up all the time.
all the other quantities (number of atoms in the universe, planck times since the big bang) are only a singly stacked exponential like 10^100
Also whats the precision of these amplitude numbers.
I don’t think this can be exactly right. I have googled some largest numbers in the universe (space and time) and they were < 10^100. Then I turned to computing 1/the magnitude of the amplitude of our branch. At that point I have some probability distribution of what that number is, and it can be surprising (aka seem fake) if it’s exponentially more than the previous numbers.
It seems quite clear to me that is a valid form of reasoning that has ever worked correctly. It may turn out to be wrong in this case, but my vibe tell is that something is up with the amplitude.
Some form of this reasoning could work for the cat in your example, e.g. comparing the width of a hair to the size of the house he’d get the order of the order of magnitude of earth (math not checked).
This might work better or worse depending on the version of Occam’s razor, which I have uncertainty over.