No: HPFGUIDX 58669 Do you think to be a DADA professor, that person must know how to do dark arts? I think my grammer is wrong. What I mean was the person who teaches DADA also know how to perform dark arts. Do you think it is logical? Snape knows a lot of dark arts and he wanted that job badly (if it's true)but Dumbledore puts him as potion professor. "cello_siok"