A meteorologist friend of mind told me a story about an American who owned a condominium overseas. The owner got an email from the caretaker saying the temperature in his condo was 32 degrees and for asked permission to turn on the air conditioning and set the thermostat to 28. The owner promptly replied:"ARE YOU CRAZY!? Turn on the heater and set the thermostat to 55 right now!" Angry at receiving such a rude reply, the caretaker dutifully complied, even to the extent of replacing the heater thermostat with one for an electric oven that could be set at 55 C (131 F). It's not clear if the story is true or just part of meteorological lore, but my friend does think that the real choice is between Fahrenheit or Kelvin. He points out if a relative scale must be used, Fahrenheit is better because it's a finer scale (1C=1.8F). The fact that Celsius is scaled to the phase transitions of water is merely an aesthetic advantage in his view. Besides, there are no recognized named multiples or divisions of the Celsius/Kelvin degree. It's not really a metric unit. So are Americans really right to hold out and not adopt the Celsius scale for weather reports, cooking and taking your body temperature?