Earlier quoted context omitted.
Celsius is useful if you're a beaker of water. Fahrenheit is useful if you're a human.
Humans cannot reliably determine the difference in one degree c, even though it's bigger... Fahrenheit is too fine grained, and has no interesting points relative to the things I interact with. I freeze an boil water often, however
0 = ice 100 = steam
That is pretty intuitive if you ask me. And for gravy comfortable room temp is about 25