Jerry, can you not say essentially the same for fahrenheit? It is repeatable, and consistent. Freezing is not zero only because the medium for freezing was shifted from a specific saline solution to "fresh water".
My point was Celcius does not have the base 10 ease of use of the metric system, so it's inclusion as metric is arbitrary. F, C or K could have been incorporated and little would change. The differences between F and C are jbasically ust points on a scale.
