Cold?? What is 'cold'? There is no such thing, only the ABSENCE of heat. There is NO measure of 'cold' only more/less heat. If there WERE cold you could get temperatures BELOW absolute zero by just adding some more 'cold'.

Cold is a comparitive term, like 'slow' or 'tall' ....

If the weather man said it is 0°F today and will be twice as cold tomorrow, how cold will it be?

Or if a train was going too fast and some slow had to be added... what was the speed of the train?