Huh, I think my brain is not wired to think about `x` as a storage, it is closer to "add 3 to x for x = 2", which then gets reduced to "add 3 to 2" and then the

Huh, I think my brain is not wired to think about `x` as a storage, it is closer to "add 3 to x for x = 2", which then gets reduced to "add 3 to 2" and then the destination is missing...