[mrduncan]

It's not that easy though, for example, Jacobellis v. Ohio - how would you go about defining the threshold of pornography?

http://en.wikipedia.org/wiki/I_know_it_when_I_see_it

[brianl]

Great point. Your question reminded me of the scene from Aviator: "Dr. Branson is a mathematician of some note...yes. And he will prove that, in fact, Ms. Russell's mammaries are no more prominant than any of these other fine ladies. Doctor? Doctor... you forgot your calipers."

[badkins]

that's my point. If something can't be specified unambiguously in code, it shouldn't be in a law. Whether the verdict is innocent or guilty shouldn't rest on who happens to be sitting on the bench that day.