**Describe the error** From [here](https://lean-lang.org/doc/reference/latest//The-Simplifier/Invoking-the-Simplifier/#simp-tactic-params): > A [configuration options](https://lean-lang.org/doc/reference/latest/Tactic-Proofs/The-Tactic-Language/#tactic-config), which should include the fields of [Lean.Meta.Simp.Config](https://lean-lang.org/doc/reference/latest/The-Simplifier/Configuring-Simplification/#Lean___Meta___Simp___Config___mk) or [Lean.Meta.DSimp.Config](https://lean-lang.org/doc/reference/latest/The-Simplifier/Configuring-Simplification/#Lean___Meta___DSimp___Config___mk), depending on whether the simplifier being invoked is a version of [simp](https://lean-lang.org/doc/reference/latest/Tactic-Proofs/Tactic-Reference/#simp) or a version of [dsimp](https://lean-lang.org/doc/reference/latest/Tactic-Proofs/Tactic-Reference/#dsimp). Why is it incorrect and/or confusing? "A configuration options" seems ungrammatical to me.