Our immediate intuition about (1) is that –ever indicates speaker’s ignorance. We hear the speaker as signaling that she doesn’t know what Arlo is cooking, while at the same time asserting that no matter what Arlo is cooking, there’s a lot of garlic in it. The FR without –ever in (2) carries no such signal of ignorance.

At first glance, this is an entirely unremarkable kind of sentence. It is easy to find naturally occuring exponents. Its meaning is also clear: taking the A train is a necessary condition for going to Harlem. Hence the term “anankastic conditional”, Ananke being the Greek protogonos of inevitability, compulsion and necessity.