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Questions tagged [consistency-strength]

Use this tag when discussing the relative logical strength of axiom sets or foundations of theorem provers

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What is known about the consistency of proof assistant metatheories?

I realised I don't know the status of consistency of theorem provers' metatheories - what is currently known? For example, as far as I know Lean's type theory is equiconsistent to ZFC+countably many ...
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