haskell brain damage cancer invades scheme*

http://blog.racket-lang.org/2007/11/getting-rid-of-set-car-and-set-cdr.html

(* depr derp we're not "scheme" anymore... i know)

>>44
Why don't you think for yourself before asking stupid questions.

>>45
Depends on the Lithp implementation, though. SBCL actually checks types at compile-time.