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Use this tag for questions about mathematical or logical foundations of proof assistants. Questions should be related in some way to proof assistants. Possible topics might include mathematical modelling, consistency and computability, universes, etc.
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Why is $\Bbb Z = \Bbb N$ independent of Lean?
In this answer, it is noted
For a silly example, in ZFC with the usual encoding, $\mathbb{Z} \neq \mathbb{N}$, but in Lean it is well-known that this is independent. Of course in both ZFC or Lean, o …