I read your post in the other thread by Mitch_Porter, asking about why your post here got downvoted. As someone who would also have responded with the answer "uncountably many" and was in fact surprised to find that that wasn't quickly established as the obvious correct answer, I thought I might come take a look.
I would guess that the (mild) downvoting on this post comes from the fact that after your first sentence, you stop talking about specific instances of decoherence and start talking about omniverses and probabilities of 1 and 0. your language is more technical than it needs to be and grammatically odd.
It is also so
it is absurd to suppose
if there be anything
contains only this one...among uncountably many
all of these fragments make me cringe and have to parse what you're saying.
I hope this helps!
How many universes "branch off" from a "quantum event", and in how many of them is the cat dead vs alive, and what about non-50/50 scenarios, and please answer so that a physics dummy can maybe kind of understand?
(Is it just 1 with the live cat and 1 with the dead one?)