[Haskell-beginners] undefined symbol not allowed?

I'm one of those evil people who loves to sprinkle Unicode throughout my code. I thought it was pretty cool when I learned about the UnicodeSyntax language extension, as well as the base-unicode-symbols package. However, I am a little perplexed that this symbol is not provided by either of those: ⊥ That is, the "bottom" symbol, Unicode #22A5 (\8869), which I have seen in some programming texts as representing the undefined expression. I tried just defining ⊥ = undefined But ghc won't parse that. Why is this? And is there a way to make it work? -- frigidcode.com theologia.indicium.us