lean4-htt/tests/lean/grind/grind_ite_congr.lean
2025-05-28 08:56:23 +00:00

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Text

set_option grind.warning false
example : ((if true then id else id) false) = false := by
grind
example : ((if (!false) = true then id else id) false) = false := by
decide
example : ((if (!false) = true then id else id) false) = false := by
grind -- fails