Theory about Priori Encantatem discrepancy

[Katie]

No: HPFGUIDX 160065

Skywalker wrote:
( http://groups.yahoo.com/group/HPforGrownups/message/1530 )
> Lilly (knowing it's really Harry) tries to protect him
> (the reason for the screams that Harry hears when the
> dementors are near in PoA) but the spell hits Harry and
> is reflected by the charm of his mother's love.

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Katie says:

The reason Harry is not killed by Avada Kedavra is because Lily
died to protect Harry which is what created the protection around
Harry.

LV says in GoF on page 652

"You all know that on the night I lost my powers and my body, I
tried to kill him. His mother died in the attempt to save him-and
unwittingly provided him with a protection I admit I had not
forseen...I could not touch the boy."

If LV would have tried for Harry first without killing Lily Harry
would be dead. LV was not after Lily he would have let her go free.

No curse or countercurse can deflect Avada Kedavra it is only
because of Lily's sacrifice was Harry protected. So there is
really no way Lily could have put a spell on Harry to protect him
by love before hand.

As Professor Moody says in GOF (page 216)
"'Not nice,' he said calmly. 'Not pleasant. And there's no
countercurse. There's  no blocking it. Only one known person ever
survived it, and he's sitting right in front of me."

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Now in terms of the whole polyjuice potion and them knowing LV was
after them,

They knew that LV was after them. I am going to give you a synopsis
on this conversation between Fudge, McGonagall, Hagrid, Flitwick,
and Madam Rosmerta. This is in PoA starting on page 204.

Fudge relates that Dumbledore knew based on his spies and advised
James and Lily to go into hiding. So they used a Fidelius Charm.
This spell is a complex spell with the information of the
whereabouts inside one person until this person chooses to reveal
it, this person is called the secret-keeper. LV could have his
nose pressed against their living room window and not see them
unless the secret keeper choose to tell him. Everyone thought it
was Sirius who was the secret keeper. Dumbledore himself offered
himself as one because he felt that someone close to Lily and
James was feeding information to LV. Less than a week later Lily
and James were killed.

Like I said, everyone else thought that it was Sirius but we find
out at the end of PoA Sirius convinced James to switch to Peter.
James was under the impression that none of his friends would
betray him so they really had no reason to think LV could find
them. So I feel that they had no plan in place. If they did I
would think they would have a back up plan. As they were suprised
they ended up losing their lives.

Katie