In “Humanism” it is stated that, if you don’t realise you are under attack, you can lose the ability to Apparate. (It’s a happy thought, presumably.) Quirrell is particularly vulnerable to the Dementor’s attack, same as Harry, so this might be particularly dangerous to him.
In “Humanism” it is stated that, if you don’t realise you are under attack, you can lose the ability to Apparate. (It’s a happy thought, presumably.) Quirrell is particularly vulnerable to the Dementor’s attack, same as Harry, so this might be particularly dangerous to him.