Conclusion before reasoning. post-hoc.

I can do it too.

- 0C - 30C are nice round numbers that are much better numbers for human comfort than 0F and 100F are. - above 0C in the winter means "it's going to be messy outside", and is the most important number. - 100C is an important number for cooking - a degree C is a reasonable interval. People using degrees F tend to round to multiples of 5, which is too large especially around room temperature, but a single degree F change is imperceptible.