5. Don't Point That At Me Unless You Mean It
Several times in the course of the Harry Potter books, J.K. has told us that the Avada Kedavra is not a curse you can make lightly.
In Goblet of Fire, the fake Mad Eye Moody tells his DADA class:
"Avada Kedavra's a curse that needs a powerful bit of magic behind it -- you could all get your wands out now and point them at me and say the words, and I doubt I'd get so much as a nosebleed." (GoF pg 217)
And in Order of the Phoenix, we learn more about Avada Kedavra when Harry tries to curse Bellatrix:
“Hatred rose in Harry such that he had never known before. He flung himself out from behind the fountain and bellowed "Crucio!" Bellatrix screamed. The spell had knocked her off her feet, but she did not writhe or shriek with pain as Neville had -- she was already on her feet again ... "Never used an Unforgivable Curse before, have you, boy?" she yelled. "You need to mean them, Potter! You need to really want to cause pain -- to enjoy it ..." (OotP pg 810/715)
If Snape was really working on Dumbledore's orders to make it look to the world as if Snape had killed him, even if he had used the real Avada Kedavra, if he had not really meant it, if he really didn't want to kill Dumbledore, then isn't it possible that the curse didn't kill Dumbledore, but only injured him badly?
In Goblet of Fire, the fake Mad Eye Moody tells his DADA class:
"Avada Kedavra's a curse that needs a powerful bit of magic behind it -- you could all get your wands out now and point them at me and say the words, and I doubt I'd get so much as a nosebleed." (GoF pg 217)
And in Order of the Phoenix, we learn more about Avada Kedavra when Harry tries to curse Bellatrix:
“Hatred rose in Harry such that he had never known before. He flung himself out from behind the fountain and bellowed "Crucio!" Bellatrix screamed. The spell had knocked her off her feet, but she did not writhe or shriek with pain as Neville had -- she was already on her feet again ... "Never used an Unforgivable Curse before, have you, boy?" she yelled. "You need to mean them, Potter! You need to really want to cause pain -- to enjoy it ..." (OotP pg 810/715)
If Snape was really working on Dumbledore's orders to make it look to the world as if Snape had killed him, even if he had used the real Avada Kedavra, if he had not really meant it, if he really didn't want to kill Dumbledore, then isn't it possible that the curse didn't kill Dumbledore, but only injured him badly?