(a) The empty list is treated as nil. (b) The scoping is in fact strange; what you saw, however, was a bug. (c) cons expects a list as its second argument. Thi

(a) The empty list is treated as nil. (b) The scoping is in fact strange; what you saw, however, was a bug. (c) cons expects a list as its second argument. This certainly isn't useable for anything, but I think it comes somewhat close to being lisp.