ELI5: Explain Like I'm 5

Extended modal realism

Extended modal realism is a way of thinking about the world we live in. It says that our world is like a big puzzle, made up of lots of different pieces that all fit together. These pieces can be things like numbers, ideas, and even abstract concepts. The idea is that all these pieces can exist at the same time, even if we don't always understand how everything fits together. It's like a big picture where every piece has a place.