What question would tell you where someone's heart is?
octane: People lie out their ass in interviews.  They're also likely to jump ship at any time in the future for a wide variety of reasons.  Maybe they just don't like the leftovers you bring to work because it stinks up the office.  Who knows.  It's called risk, it's real, and if you're an entrepreneur or businessman you better get used to it.Ask them a few technical questions to make sure they aren't full of it, use your gut and intuition, do a probationary contract period, and hire them after 2 or 3 months if they're good.  Some successful managers don't even do the contract period.  If you can't successfully judge people at least on a semi-consistent basis, you might want to try finding a business partner who can.At some point running a business, you have to learn what "risk" and "unknown" really means - it means you have no fucking clue what's going to happen.  Plan for outcomes, don't plan on outcomes.