As I also mentioned in the other thread, there is no evidence for this cosmological multiverse, yet it is the one most people are quite willing to accept. On the other hand, there is overwhelming evidence for the quantum multiverse, yet this is supposed to be controversial. I find the psychology of this situation utterly bizarre. To add to the irony, if the cosmological multiverse exists, the quantum multiverse adds zero complexity to our view of reality. Very odd situation! — tom
What are the odds that out of all of the 3 pound hunks of matter out there in the vast universe or maybe even infinite multiverse, most of them lacking biology, you just happen to find yourself being a human in this special place and time? Did you win the cosmic lottery a hundred times over or something? Shouldn't you find it a bit surprising that you find yourself occupying such a privileged vantage point on the world? After all, it seems, you might have been a mouse instead, or a bacterium, or a cloud of dust or a rock in outer space. — oysteroid
Suppose we have a big bucket filled with a trillion marbles, one of which is gold, the rest of which are blue. We blindfold you and have you dig around and withdraw a marble. Then we ask you whether or not you should expect to take off the blindfold and find yourself holding a gold marble. Of course, the answer is no. With a random sample, you should expect to have a typical sample. If you do end up finding yourself with the one in a trillion golden marble, shouldn't you find this surprising? — oysteroid
Consider further what a strange idea it is that you can be something, some arbitrarily extended, but limited, collection of physical particles. People sometimes ask what it must be like, if it is like anything at all, to be a rock. Notice what they are doing! Is there some magical boundary around a rock other than the one we impose when we see a rock and identify it as such, mentally separating it from its surroundings? If a rock, which is a collection of many smaller things, why stop the collection at that point? Why not a pile of rocks? Why not the mountain? Why not the planet? Why not the whole universe? — oysteroid
There is one substance and it experiences all of its modifications and relations and is everywhere present to itself. And if you want to know what it is like to be it, just ask yourself. You're it. You're everything. — oysteroid
It is my understanding neither multiverse is accepted by the physics community. — T Clark
As far as I can tell, the only justification for belief in the cosmological multiiverse is as a solution to problems caused by the so-called strong anthropic principle. — T Clark
Those problems have always seemed to me to reflect a misunderstanding of probability. — T Clark
It certainly isn't true that the quantum multiverse is uncontroversial. The way it is typically formulated, it is neither true nor untrue, since the other universes aren't even theoretically detectable. — T Clark
Are the other universes in the cosmological universe theoretically detectible? If not, then the theory doesn't mean anything. — T Clark
best theory of how our universe began, — tom
What is that misunderstanding, and how does it apply to a deterministic multiverse? — tom
That is simply false. We routinely interact with the quantum multiverse. — tom
You could have asked the same question of gravitational waves for 100 years. — tom
Suppose that there are an infinite amount of universes and that everything that can happen does happen in some universe. So there's a universe just like ours with a planet identical to earth (lets call it earth-2), and everything on earth-2 is identical to earth to the last atom. So there's a Purple Pond user just like me typing this thought experiment. I'm atom for atom identical to the Purple Pond on this different universe. The question is: even though I'm separated from by an unimaginable distance, and we belong to different universes, am I the same person? — Purple Pond
Are you in the same place as me when I'm in Times Square and you're 10 miles above? — Marchesk
The question is: even though I'm separated from by an unimaginable distance, and we belong to different universes, am I the same person? — Purple Pond
According to this article the idea is complete nonsense. It fails experimentally. — Purple Pond
But still, if we agree that a person in two different multiverses who is exactly the same is the same person, then, by that same logic, all the electrons in the universe are the same electron. — T Clark
If they are entangled, do you think you can say which one is which? Is that A over there, and B over here, or vice versa? — apokrisis
Of course MWI "solves the problem" as ever. — apokrisis
Ah, so if they are entangled, we wait until they are disentangled? Eventually there is the one Bob measured and the one Alice measured? Except now we don’t know which Bob and which Alice in which world branch as we have just duplicated them under MWI. — apokrisis
Suppose that there are an infinite amount of universes and that everything that can happen does happen in some universe. So there's a universe just like ours with a planet identical to earth (lets call it earth-2), and everything on earth-2 is identical to earth to the last atom. So there's a Purple Pond user just like me typing this thought experiment. I'm atom for atom identical to the Purple Pond on this different universe. The question is: even though I'm separated from by an unimaginable distance, and we belong to different universes, am I the same person? — Purple Pond
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