Okay I am very much at risk of sounding like an idiot but thats never bothered me before so I will plow on anyway. I never really thought this an issue when I read The Deathly Hallows. I read the final fight scene, took a moments thought and then decided I had figured out what had happened. I am referring specifically to the scene: "Expelliarmus" "Avada Kedavra" I recently had a mini-discussion with my sister and found she had interpreted what had happened completely...
Separate names with a comma.