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I actually came above the many worlds theory, and some may think that this theory warrants 2-B should it come into existence, but there is something regarding this theory. Depending on how the verse treats it, and the nature of said theory in said verse.
For instance, there is the more common interpretation where universes progressively branch off of a main timeline based on unrealized possibilities within it. In this case, the tier would depend on the size of the universe, as that would probably affect the number of possible variables it can accomodate.
Then there is the crazier, more "meta" version of it, where all possible universes already exist as fluctuations embedded in an abstract space, where change and time are technically illusions and which we only see a tiny fraction of (Said fraction being our universe, in this case).
To simplify it even more, let's take a look at this theory even more deeper.
The universe we live in may not be the only one out there. In fact, our universe could be just one of an infinite number of universes making up a "multiverse."
Though the concept may stretch credulity, there's good physics behind it. And there's not just one way to get to a multiverse — numerous physics theories independently point to such a conclusion. In fact, some experts think the existence of hidden universes is more likely than not.
Here are the five most plausible scientific theories suggesting we live in a multiverse:
1. Infinite Universes:
Scientists can't be sure what the shape of space-time is, but most likely, it's flat (as opposed to spherical or even donut-shape) and stretches out infinitely. But if space-time goes on forever, then it must start repeating at some point, because there are a finite number of ways particles can be arranged in space and time.
So if you look far enough, you would encounter another version of you — in fact, infinite versions of you. Some of these twins will be doing exactly what you're doing right now, while others will have worn a different sweater this morning, and still others will have made vastly different career and life choices.
Because the observable universe extends only as far as light has had a chance to get in the 13.7 billion years since the Big Bang (that would be 13.7 billion light-years), the space-time beyond that distance can be considered to be its own separate universe. In this way, a multitude of universes exists next to each other in a giant patchwork quilt of universes.
2. Bubble Universes:
In addition to the multiple universes created by infinitely extending space-time, other universes could arise from a theory called "eternal inflation." Inflation is the notion that the universe expanded rapidly after the Big Bang, in effect inflating like a balloon. Eternal inflation, first proposed by Tufts University cosmologist Alexander Vilenkin, suggests that some pockets of space stop inflating, while other regions continue to inflate, thus giving rise to many isolated "bubble universes."
Thus, our own universe, where inflation has ended, allowing stars and galaxies to form, is but a small bubble in a vast sea of space, some of which is still inflating, that contains many other bubbles like ours. And in some of these bubble universes, the laws of physics and fundamental constants might be different than in ours, making some universes strange places indeed.
3. Parallel Universes:
Another idea that arises from string theory is the notion of "braneworlds" — parallel universes that hover just out of reach of our own, proposed by Princeton University's Paul Steinhardt and Neil Turok of the Perimeter Institute for Theoretical Physics in Ontario, Canada. The idea comes from the possibility of many more dimensions to our world than the three of space and one of time that we know. In addition to our own three-dimensional "brane" of space, other three-dimensional branes may float in a higher-dimensional space.
Columbia University physicist Brian Greene describes the idea as the notion that "our universe is one of potentially numerous 'slabs' floating in a higher-dimensional space, much like a slice of bread within a grander cosmic loaf," in his book "The Hidden Reality" (Vintage Books, 2011).
Going back to the idea that space-time is flat, the number of possible particle configurations in multiple universes would be limited to 10^10^122 distinct possibilities, to be exact. So, with an infinite number of cosmic patches, the particle arrangements within them must repeat — infinitely many times over. This means there are infinitely many parallel universes, or rather infinite parallel universes: cosmic patches exactly the same as ours (containing someone exactly like you), as well as patches that differ by just one particle's position, patches that differ by two particles' positions, and so on down to patches that are totally different from ours.
4. Daughter Universes:
The theory of quantum mechanics, which reigns over the tiny world of subatomic particles, suggests another way multiple universes might arise. Quantum mechanics describes the world in terms of probabilities, rather than definite outcomes. And the mathematics of this theory might suggest that all possible outcomes of a situation do occur — in their own separate universes. For example, if you reach a crossroads where you can go right or left, the present universe gives rise to two daughter universes: one in which you go right, and one in which you go left.
"And in each universe, there's a copy of you witnessing one or the other outcome, thinking — incorrectly — that your reality is the only reality," Greene wrote in "The Hidden Reality."
5. Mathematical Universes:
Scientists have debated whether mathematics is simply a useful tool for describing the universe, or whether math itself is the fundamental reality, and our observations of the universe are just imperfect perceptions of its true mathematical nature. If the latter is the case, then perhaps the particular mathematical structure that makes up our universe isn't the only option, and in fact all possible mathematical structures exist as their own separate universes.
"A mathematical structure is something that you can describe in a way that's completely independent of human baggage," said Max Tegmark of MIT, who proposed this brain-twistin gidea. "I really believe that there is this universe out there that can exist independently of me that would continue to exist even if there were no humans."
All of this seems complicated, right?
But the 1 thing to simplify it is to see whether or not these parts of theories coexist inside the verse.
As i said from above, The Theory Of Many Worlds' potency solely depends on how the verse views it.
To simplify it even more:
For example, we take these scans from Persona 1:
https://cdn.discordapp.com/attachments/670747588080959528/690255339589075113/image0.jpg
https://cdn.discordapp.com/attachments/670747588080959528/690255402528800902/image0.jpg
https://cdn.discordapp.com/attachments/670747588080959528/690255469301858506/image0.jpg
As you can see, the verse mentions the Many Worlds Theory, then mentions that they are parallel worlds. This means that The Parallel Universes theory coexists in this world. Which in turn means the existence of infinite parallel worlds.
And before anyone says anything when you see the word "Countless", look at this link below...
https://www.definitions.net/definition/countless
Definition of Countless:
countless, infinite, innumerable, innumerous, multitudinous, myriad, numberless, uncounted, unnumberable, unnumbered, unnumerable(adj) too numerous to be counted "incalculable riches"; "countless hours"; "an infinite number of reasons"; "innumerable difficulties"; "the multitudinous seas"; "myriad stars"; "untold thousands".
So the meaning of the word "Countless" depends on its position in the phrase. For example, i can say "Countless Bodies", but does that mean that there are infinite amounts of bodies? Nope, because logically speaking, there is no such thing as infinite amounts of human bodies in the 1st place.
On the other hand, i can say "Countless Parallel Worlds", and then place the theory of Parallel Universes, or the theory of Infinite Universes in it, and it would place infinite amounts of dimensions in it, or in the case of Parallel Universes theory, would mean infinite higher planes of existence (If you place the word "Countless" in consideration).
To simplify it even more:
The theory of Infinite Universes means 2-A.
The theory of Daughter Universes means 2-B (A universe born from another, where another universe gives birth to another universe and so on, but this time, there is a definite number for it).
The theory of Bubble Universes means either 2-C, 2-B, or 2-A (Depending on the context, whether a universe actually inflates to bring forth multiple universes, or infinite amounts of universes. And in fiction, stuff like this is common most of the times if it's mentioned).
The theory of Mathematical Universes means Low 2-C or 2-B (Since you have massive amounts of numbers in our world, and that all possible mathematical structures exist as their own separate universes, and no matter how much numbers are there, they are definite and finite in our world, and maybe it could be said the all numbers are the thing that form our own universe or it can form multiple universes).
The theory of Parallel Universes means 2-A, or up to High 1-B (Considering the fact that Parallel Universes means higher planes of existence, and if mentioned to be "Countless worlds", or "Infinite Worlds", and it was never mentioned a definite number of Parallel Universes, then this would mean the existence of Infinite transcendence levels of reality above our own space-time, which would warrant to High 1-B).
And remember: Only when 1 out of those 5 theories being mentioned and stated with The Theory Of Many Worlds could this theory and its tier explanations be applied.
For instance, there is the more common interpretation where universes progressively branch off of a main timeline based on unrealized possibilities within it. In this case, the tier would depend on the size of the universe, as that would probably affect the number of possible variables it can accomodate.
Then there is the crazier, more "meta" version of it, where all possible universes already exist as fluctuations embedded in an abstract space, where change and time are technically illusions and which we only see a tiny fraction of (Said fraction being our universe, in this case).
To simplify it even more, let's take a look at this theory even more deeper.
The universe we live in may not be the only one out there. In fact, our universe could be just one of an infinite number of universes making up a "multiverse."
Though the concept may stretch credulity, there's good physics behind it. And there's not just one way to get to a multiverse — numerous physics theories independently point to such a conclusion. In fact, some experts think the existence of hidden universes is more likely than not.
Here are the five most plausible scientific theories suggesting we live in a multiverse:
1. Infinite Universes:
Scientists can't be sure what the shape of space-time is, but most likely, it's flat (as opposed to spherical or even donut-shape) and stretches out infinitely. But if space-time goes on forever, then it must start repeating at some point, because there are a finite number of ways particles can be arranged in space and time.
So if you look far enough, you would encounter another version of you — in fact, infinite versions of you. Some of these twins will be doing exactly what you're doing right now, while others will have worn a different sweater this morning, and still others will have made vastly different career and life choices.
Because the observable universe extends only as far as light has had a chance to get in the 13.7 billion years since the Big Bang (that would be 13.7 billion light-years), the space-time beyond that distance can be considered to be its own separate universe. In this way, a multitude of universes exists next to each other in a giant patchwork quilt of universes.
2. Bubble Universes:
In addition to the multiple universes created by infinitely extending space-time, other universes could arise from a theory called "eternal inflation." Inflation is the notion that the universe expanded rapidly after the Big Bang, in effect inflating like a balloon. Eternal inflation, first proposed by Tufts University cosmologist Alexander Vilenkin, suggests that some pockets of space stop inflating, while other regions continue to inflate, thus giving rise to many isolated "bubble universes."
Thus, our own universe, where inflation has ended, allowing stars and galaxies to form, is but a small bubble in a vast sea of space, some of which is still inflating, that contains many other bubbles like ours. And in some of these bubble universes, the laws of physics and fundamental constants might be different than in ours, making some universes strange places indeed.
3. Parallel Universes:
Another idea that arises from string theory is the notion of "braneworlds" — parallel universes that hover just out of reach of our own, proposed by Princeton University's Paul Steinhardt and Neil Turok of the Perimeter Institute for Theoretical Physics in Ontario, Canada. The idea comes from the possibility of many more dimensions to our world than the three of space and one of time that we know. In addition to our own three-dimensional "brane" of space, other three-dimensional branes may float in a higher-dimensional space.
Columbia University physicist Brian Greene describes the idea as the notion that "our universe is one of potentially numerous 'slabs' floating in a higher-dimensional space, much like a slice of bread within a grander cosmic loaf," in his book "The Hidden Reality" (Vintage Books, 2011).
Going back to the idea that space-time is flat, the number of possible particle configurations in multiple universes would be limited to 10^10^122 distinct possibilities, to be exact. So, with an infinite number of cosmic patches, the particle arrangements within them must repeat — infinitely many times over. This means there are infinitely many parallel universes, or rather infinite parallel universes: cosmic patches exactly the same as ours (containing someone exactly like you), as well as patches that differ by just one particle's position, patches that differ by two particles' positions, and so on down to patches that are totally different from ours.
4. Daughter Universes:
The theory of quantum mechanics, which reigns over the tiny world of subatomic particles, suggests another way multiple universes might arise. Quantum mechanics describes the world in terms of probabilities, rather than definite outcomes. And the mathematics of this theory might suggest that all possible outcomes of a situation do occur — in their own separate universes. For example, if you reach a crossroads where you can go right or left, the present universe gives rise to two daughter universes: one in which you go right, and one in which you go left.
"And in each universe, there's a copy of you witnessing one or the other outcome, thinking — incorrectly — that your reality is the only reality," Greene wrote in "The Hidden Reality."
5. Mathematical Universes:
Scientists have debated whether mathematics is simply a useful tool for describing the universe, or whether math itself is the fundamental reality, and our observations of the universe are just imperfect perceptions of its true mathematical nature. If the latter is the case, then perhaps the particular mathematical structure that makes up our universe isn't the only option, and in fact all possible mathematical structures exist as their own separate universes.
"A mathematical structure is something that you can describe in a way that's completely independent of human baggage," said Max Tegmark of MIT, who proposed this brain-twistin gidea. "I really believe that there is this universe out there that can exist independently of me that would continue to exist even if there were no humans."
All of this seems complicated, right?
But the 1 thing to simplify it is to see whether or not these parts of theories coexist inside the verse.
As i said from above, The Theory Of Many Worlds' potency solely depends on how the verse views it.
To simplify it even more:
For example, we take these scans from Persona 1:
https://cdn.discordapp.com/attachments/670747588080959528/690255339589075113/image0.jpg
https://cdn.discordapp.com/attachments/670747588080959528/690255402528800902/image0.jpg
https://cdn.discordapp.com/attachments/670747588080959528/690255469301858506/image0.jpg
As you can see, the verse mentions the Many Worlds Theory, then mentions that they are parallel worlds. This means that The Parallel Universes theory coexists in this world. Which in turn means the existence of infinite parallel worlds.
And before anyone says anything when you see the word "Countless", look at this link below...
https://www.definitions.net/definition/countless
Definition of Countless:
countless, infinite, innumerable, innumerous, multitudinous, myriad, numberless, uncounted, unnumberable, unnumbered, unnumerable(adj) too numerous to be counted "incalculable riches"; "countless hours"; "an infinite number of reasons"; "innumerable difficulties"; "the multitudinous seas"; "myriad stars"; "untold thousands".
So the meaning of the word "Countless" depends on its position in the phrase. For example, i can say "Countless Bodies", but does that mean that there are infinite amounts of bodies? Nope, because logically speaking, there is no such thing as infinite amounts of human bodies in the 1st place.
On the other hand, i can say "Countless Parallel Worlds", and then place the theory of Parallel Universes, or the theory of Infinite Universes in it, and it would place infinite amounts of dimensions in it, or in the case of Parallel Universes theory, would mean infinite higher planes of existence (If you place the word "Countless" in consideration).
To simplify it even more:
The theory of Infinite Universes means 2-A.
The theory of Daughter Universes means 2-B (A universe born from another, where another universe gives birth to another universe and so on, but this time, there is a definite number for it).
The theory of Bubble Universes means either 2-C, 2-B, or 2-A (Depending on the context, whether a universe actually inflates to bring forth multiple universes, or infinite amounts of universes. And in fiction, stuff like this is common most of the times if it's mentioned).
The theory of Mathematical Universes means Low 2-C or 2-B (Since you have massive amounts of numbers in our world, and that all possible mathematical structures exist as their own separate universes, and no matter how much numbers are there, they are definite and finite in our world, and maybe it could be said the all numbers are the thing that form our own universe or it can form multiple universes).
The theory of Parallel Universes means 2-A, or up to High 1-B (Considering the fact that Parallel Universes means higher planes of existence, and if mentioned to be "Countless worlds", or "Infinite Worlds", and it was never mentioned a definite number of Parallel Universes, then this would mean the existence of Infinite transcendence levels of reality above our own space-time, which would warrant to High 1-B).
And remember: Only when 1 out of those 5 theories being mentioned and stated with The Theory Of Many Worlds could this theory and its tier explanations be applied.
