11th Commandment

When thou drivest in thy vehicle and encounter another who approacheth in the opposite lane, thou shalt, without taking the right hand from the steering wheel, lift the first two fingers of said hand in a gesture of cordial greeting and acknowledgement. Two is the number of the fingers thou shalt lift – not one, for to lift a single finger is insufficiently neighborly and may, depending on the finger, be a source of grievous offence, however neither shalt thou lift three fingers which is presumptuous and overly familiar. Two fingers and two fingers only shalt thou lift to thine neighbor.