Planescape Planescape IS D&D Says Jeremy Crawford

Planescape is Jeremy Crawford's favourite D&D setting. "It is D&D", he says, as he talks about how in the 2024 core rulebook updates Planescape will be more up front and center as "the setting of settings".

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[Charlaquin]

The concept of "universe" already encompasses everything. Multiverse just describes details of how the universe works.

No. A universe contains everything that exists, but is finite (like, our actual real-life universe has a finite, countable number of stars in it). A multiverse, hypothetically, contains multiple universes, and in the context of fictional settings, a muktiverse contains all hypothetical universes that could exist within a given setting’s constraints. The way some people are trying to use the term multiverse here, containing all hypothetical multiverses, would be better described as an omniverse.

 

[Incenjucar]

Reality works

no universe encompasses everything in this physical universe. Multiverse adds the idea that the Universe has 'other versions, or configurations, or whatever they are that are just as vast but simply different. the original Cosmos or what we now call Universe was presumed to be all the energy and matter we can measure. think of this this way. Our old concept of the universe existing as a flame burning. All we can see and measure is in the flame. The Multiverse is what the flame exists in.

By definition the universe is everything.

The term multiverse just adds divisions, like adding walls to a warehouse to create rooms

 

[nevin]

no
all existing matter and space considered as a whole; the cosmos. The universe is believed to be at least 10 billion light years in diameter and contains a vast number of galaxies; it has been expanding since its creation in the Big Bang about 13 billion years ago.

the universe has always just been our room.....

 

[Charlaquin]

yeah, I saw that, but it is still infinite… that explanation works with numbers, not really with anything else

No, it absolutely works with the concept of multiverses. Even if the many worlds interpretation of quantum physics was correct, that wouldn’t necessarily mean that a universe exists where everything is the same except we all have mustaches. That’s just not how infinity actually works.

 

[Incenjucar]

An infinity of spaces which are slightly to the left of each other will still never produce a Garfield who loves Mondays.

 

[nevin]

That’s just not how infinity actually works.

say's "we" who don't even know how basic particles in the universe truly work.....It's all guesswork and theory and none of us really know.

 

[Incenjucar]

say's "we" who don't even know how basic particles in the universe truly work.....It's all guesswork and theory and none of us really know.

It's the definition of infinity. It's a mathematical concept. We have other words for "all possibilities".

 

[nevin]

but if inifinity is everything then it shouldn't be repeatable. If it is repeatable then it's really not everything because things can be duplicated. So if they can be duplicated how many times can they be duplicated. in Theory your version of infinity means and infinite number of infinites which means an infinite number of potential exact duplicates. it gets really dicey to actually go into multiple infinities and then try to proclaim something can't exist.

 

[Incenjucar]

You can have infinite 1s and infinite oranges and never have a 0 or a banana.

 

[nevin]

Yes infinite means there is no end. It generally gets applied to the idea of an infinite universe which leads to a multiverse in which there are no limits and everything that is possible is possible. Still not seeing any problem with the definition of infinite and multiverse that contradict anything said here.