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Don't Be the Gunslinger with Bad Aim
Your boss rushes in and wants to know what the hell exactly caused the dismal cat-food sales in Canada. You could look him dead in the eye, reach for the closest unconfirmed-but-feasible piece of data and whip out a response—bang! Only to find out later that Canadians don't hate felines and haven't banned them from private homes. Or you could just say, "I don't know the answer. But give me five minutes and I will find it for you." You don't have to be the fastest draw in the West. Only the most accurate.