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The section Lexical Scoping https://ponyfoo.com/books/practical-modern-javascript/chapters/2#lexical-scoping-8zsxfqh9
claims that arrow functions don't create closures. It looks like they do. In fact, the code relies on closure of arguments in the evaluation of the returned function. I think this should say "arrow functions don't create their own lexical scope, so arguments is accessed from the closure of the enclosing function".