3 ms·Freezing and boiling water really does not seem that arbitrary to me.by groestl 4y agoFreezing and boiling water really does not seem that arbitrary to me.Steltek 4y agoWhat's the pressure for your nonarbitrary boiling point? In SI units please.groestl 4y agoIt know it's not SI level scientific, but still, it's not as arbitrary as the "temperature of a normal human body".