I've been petrified of this day ever since I began work here, but the guy threw me a softball:
GUY: "Hey, if something was approved for a patent in China over a year ago, can we patent it in the US?"
ME: "Well, probably not. Do you know if it was published?"
GUY: "Let's assume it was."
ME: "OK. Assuming it was published or patented over one year ago, then we can't."
wOOt! A definitive answer! This is much better than something like "Hey, the Wachowski brothers ripped off my script for The Matrix. Can I sue?"
(Actually that would be an easy question too, since someone just did. And won.)