Daniel

@Nora If we're allowed to change the exponent on height arbitrarily, we could also call Area a ratio of width to height (with the exponent set to -1 on the latter, of course). Of course we'd be totally incorrect, we'd actually be describing an aspect ratio - not an area. I can tell you the ratio of my weight to height: 3 lbs/inch (50 kg/m). You cannot possibly give me my BMI except by guessing. That is because BMI is not determined by ratio of weight to height, nor is it synonymous.