Great answers here. The best ELI5 version I can think of is “Why? Well, we tried to connect each kind of infinity to each other by mapping each value between them and found some were larger than others”
This is an other example of languages like English (or Latin this case infinite meaning “without end”) created to barter goats and tell stories around the dinner table … are inadequate to explain the full breadth of logic … or in physics, the true nature of the fabric of reality.
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