Can you get ticketed for going 1 mph over the speed limit?

[SenorBeef]

I know most cops will give you at least 5 mph before they'll pull you over for speeding, but if they wanted to, could they pull you over for a 1 mph violation?

I assume there's some margin of error for their radar gear, and I'm thinking perhaps there needs to be a certain amount over the speed limit before a ticket can be given.

Or, perhaps, they can ticket you at 1 mph over the limit, but you could easily argue in court that their radar is off, etc. and get out of the ticket.