4. Syntax and SemanticsAfter that whirlwind tour, we'll settle down for a few chapters to take a more systematic look at the features you've used so far. I'll start with an overview of the basic elements of Lisp's syntax and semantics, which means, of course, that I must first address that burning question. . . What's with All the Parentheses?Lisp's syntax is quite a bit different from the syntax