So bottom line, all canon is rewritable in doctor who, nothing is ever set in stone because time and space changes can occur. Timey-wimey seems appropriate. It's funny how canon like, oh well the Master has been established as a woman, the general and the corsair, so ergo the Doctor can be A woman as well., that's supposed to be hard core canon. But say the doctor could become a previous incarnation in the curator, and oh..canon isn't set in stone. It contradicts all the time.. So which is it?