I was reading "Introduction to statistical physics" by Kerson Huang. I came across this line.
The existence of absolute zero does not mean that the temperature scale terminates at the low end,for the scale is an open set without boundaries. It is a matter of convention that we call $T$ the temperature.We could have used $1/T$ as the temperature and absolute zero would be infinity.
I am not able to understand this line. please help.