"mmHg" is also on my list of units that are stupid. :P Likewise I understand your argument (yes, of course I know "fluid ounce" is a unit of volume and "ounce"

"mmHg" is also on my list of units that are stupid. :P Likewise I understand your argument (yes, of course I know "fluid ounce" is a unit of volume and "ounce" is a unit of weight), I just think naming a unit of volume after a unit of weight is dumb.