[xedrac]

Sure. I think the point he was trying to make is that some languages are more complex than others. And in that context, the fact that Lisp has the flexibility to override just about anything actually makes the language more complex. Because now you can't make any assumptions about anything. In some ways Lisp is the most complex language in existence because it encompasses an infinite number of sub languages (ergo Racket's tagline "The programmable programming language"). In other ways it's the most simple language ever.