I still don't understand... but whatever. Just don't try to explain it to me, okay?My guess would be because you can just add one line to the F, and it becomes an E. So to avoid people from turning their F's into E's.
What the heck? What kind of grade system is that? :PTell that to the one who made ECTS (http://en.wikipedia.org/wiki/European_Credit_Transfer_and_Accumulation_System). That's why it is the way it is now. :P
Tell those school people to use A to D + F. :P
Because Kelvin is more used in science, and makes more sense at it starts at 0 rather than -273,15.