"Only a Sith deals in absolutes..." - Obi-wan Kenobi.
Clearly a Jedi would not have dealt with this thought in the absolute fashion Kenobi used ("Only..."), but would have phrased it with some wiggle room, ("Sith often deal in absolutes...").
If Obi-wan meant what he said, and if what he said was true, it follows that he was a sith.
Okay - seriously, Obi-wan isn't a sith... I am just bored, and remembered how hilarious that quote was when I first heard it, and marveled at how, in the first three movies, the dark side was bad, and the light side was good, and there was no attempt to try and frame good or bad in terms of the moral equations of our day. When Obi-wan spouted this illogical moralism, I thought to myself - good gravy! Didn't the writer of that line realize that he phrased it in a way that had Obi-wan dealing in absolutes (Only a Sith? That's an absolute there mister...).
Am I the only one who thought that was an odd line?