Absolutely. I got burned too many times on this one. The translation is "I can't describe it but I know what it is when I see it." (10 points if you know the famous quote)
Justice Stewart when asked to define "pornography".
Damn, you beat me to it!!
It's one of my favorite quotes. That, plus "Always be in the superior knowledge position," but that one was just uttered by my brother Tom, so not too many people know it.