Why is AK unforgiveable

[Melody]

No: HPFGUIDX 45146

Chris wrote:
>>>I suspect that AK is unforgivable because it is the only (this
strikes me as odd, but it seems to fit in-canon) spell that has to be
used with deliberate intent to kill.  If you use AK, you are going to
commit murder anyway. and you know that right from the beginning.<<<<

So I write:
I always thought AK was an unforgivable curse because it was the only
curse that is unblockable.  Any other forms of death-by-curse can be
avoided.  AK cannot.  Our hero Harry, even though he is so fast,
cannot avoid it as he can the others as evident in the graveyard when
he out runs the DE's curses to get to Cedric's body and the TriWizCup.

As for Imperius and Crucio, I guess they are unforgivable because they
cause so much trouble.  Imperius is a headaches for others and MoM,
and Crucio drives people eventually insane.

Just the impression I had.

Melody