[peteretep]

> It's already there, if you know enough to recognize it

"As an SI derived unit", "or a unit to indicate", "the unit was called"

Three mentions of it being a unit in the first paragraph, alone. I understand the point being made; the conclusion that "celsius is not a unit" is bogus, however, by any common definition, including NIST's.

In a now-deleted comment, you linked to a Wikipedia page on Dimensional Analysis, which includes the sentence "to convert from units of Fahrenheit to units of Celsius".