leanprover / theorem_proving_in_lean4

Theorem Proving in Lean 4
https://leanprover.github.io/theorem_proving_in_lean4/
Apache License 2.0
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fix: clarify that Lean's core library uses classical logic #117

Open avigad opened 4 months ago

avigad commented 4 months ago

This pull request responds to the request from Bulhwi Cha to clarify that Lean's core library is not committed to avoiding classical: https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/constructive.20tactic.20mode.20in.20lean/near/431736331

The previous wording dates back to the early days of the Lean project and is no longer accurate.