If, for any reason, you find yourself incapable of casting the Killing Curse
So it’s surely not unheard of.
Canonically, I think it also took substantial magical power to be able to cast it, so I suspect that the average adult witch or wizard wouldn’t be able to use it (most ordinary adults were made out to be fairly incompetent at the magical skills they didn’t use regularly,) but Quirrel seems to be imposing rather higher standards on his students.
I wouldn’t be surprised if Quirrel could recall emotions—I was only defying the claim that “any one of us” could do so without much trouble and am using the counter example of me.
As Quirrel said in his very first class
So it’s surely not unheard of.
Canonically, I think it also took substantial magical power to be able to cast it, so I suspect that the average adult witch or wizard wouldn’t be able to use it (most ordinary adults were made out to be fairly incompetent at the magical skills they didn’t use regularly,) but Quirrel seems to be imposing rather higher standards on his students.
I wouldn’t be surprised if Quirrel could recall emotions—I was only defying the claim that “any one of us” could do so without much trouble and am using the counter example of me.