Eliza Chatbot

a minimal implementation of the original Eliza chatbot by Joe Weizenbaum.

transcribed from David Johnson-Davies' awesome LISP blog, source:
http://lisp.plasticki.com/list?24NX
http://lisp.plasticki.com/show?24GC

what I love about this implementation besides its terseness is that it doesn't rely on Regex but instead implements fuzzy pattern matching itself in a set of beautifully simple and elegant functions.