See [http://www.ai.mit.edu/docs/articles/good-news/subsection3.3.6.html], part of Gabriel's WorseIsBetter - Paper "Lisp: Good News, Bad News, and How to Win Big" Or, to look at it another way, see [http://www.paulgraham.com/arc.html], for ArcLanguage, which is Lisp, and wants to be both Better and Worse at the same time. Arc is out [http://arclanguage.org/]. (See Discussion on WorseIsBetter and TooAdvancedForItsOwnGood)