How? it is just numbers, there is no human relation. i grew up learning both measures. i know that 20C is comfortable the same at 68F is comfortable. If anything C makes more sense, at 0 things are going to want to freeze on my body. For F that is 32...an arbitrary value
Sure. Kelvin is the proper scale. Celsius is just water from freezing to boiling at some atmospheric pressure divided into 100 units. Not because there's anything absolute to it, but because water is kind of important in our lives.
"Arbitrary scale at which water freezes" is such an annoyingly dumb representation of the Fahrenheit scale, that even as a European I feel the need to defend it.