It has nothing with arguing. Piss the cop off and he's writing the ticket. Be calm, be honest, and explain the situation without any slant or BS.
The last time I was pulled over was for doing 81 in a fifty five zone. I explained to the officer that my truck had never traveled at that speed, and that his radar gun was obviously defective. The officer accepted my story and sent me on my way.
At the time I was in heavy traffic following a loaded box van. It's possible that I was traveling at 56mph, 81 was unattainable under the conditions at that time.
It's been my experience that most police respond well to honesty. When I'm in the wrong I freely admit it and offer an explanation for my actions. That explanation was "I wasn't paying attention" twice. Both times I was released with a warning.