973b.lean:5:8-5:10: warning: declaration uses `sorry`
[Meta.Tactic.simp.discharge] ✅️ ex discharge ❌️
      ?p x
[Meta.Tactic.simp.discharge] ✅️ ex discharge ❌️
      ?p (f x)
973b.lean:9:8-9:11: warning: declaration uses `sorry`