You know for a fact that the light was yellow when you coasted through it, but the cop who pulled you over begs to differ. Is your instinct to shut up, smile, and take the ticket? After all, he's the one with the gun. Or do you try to talk your way out of it by rambling: "With all due respect, according to my driver's manual -- which I just happen to have in my glove compartment next to the registration and under my insurance card -- a yellow signal means proceed with caution, and I did, maintaining a cautionary speed of twenty-five miles per hour."?