simple-counterexamples/SimpleCounterexamples/RunMEvil.lean

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theorem runM_evil
(runM : {α : Type} → {m : Type → Type} → [Monad m] → m αα) : False :=
runM (none : Option Empty) |>.elim
theorem lawfulRunM_evil
(runM : {α : Type} → {m : Type → Type} → [Monad m] → [LawfulMonad m] → m αα)
: False :=
runM (none : Option Empty) |>.elim