Q: Why can't we just do: (1 2 3) ? A: Scheme will think it's an application.
(1 2 3) ?
We can construct lists with the built-in list procedure: (list 1 2 3) ⇒ (1 2 3) list is a procedure that takes a variable number of arguments.
(list 1 2 3) ⇒ (1 2 3)