Uh, yea. Explain that to a cop when they ask you if you’ve been drinking.
I have. At one of those checkpoints, where they ask everyone if they've been drinking, I told him I'd had beer with dinner an hour and a half ago. He just waved me on; didn't even ask how many. Another time, though, I was driving to choir rehearsal with my bag of choir music on the passenger seat. The bag started to slide off the seat and I reached over to steady and reset it. I swerved a bit in the lane and was pulled over. I said I was not drinking, but was given the drunk test anyway.