Dual-core wands?

[Carol]

No: HPFGUIDX 181539

Colleen wote: 
> I wonder whether it was the fact that Harry used three wands, or
> perhaps that one of those wands (we later learn) was the Elder Wand. 
<snip>

carol responds:
Erm, no. the three wands were Wormtail's new one, Bellatrix's wand
(which flet evil to Hermione, not surprisingly), and draco's hawthorn
wand, of which Harry was now master because he took it from the
defeated Draco. Harry also became the master or potential master of
the Elder wand at that moment even though he had never seen it or
touched it (LV had stolen it from DD's tomb). I personally think that
the wand chose him over Draco, who had Disarmed DD and become its
master (also without ever touching it) during the final confrontation
with Voldemort, when he informed the wand that its master had been
Disarmed. Wands appear to be sentient; it may also have known that the
Wizard holding it was the deadly enemy of its former master,
Dumbledore. It certainly knew that it had been used for a lot of AKs
and a murder involving a snake. Maybe it realized that accepting Harry
as its master was the way to defeat the Dark Wizard holding it. Or
maybe it just knew that, of the possible masters available, Draco was
not present and Harry was. LV was not a potential master since he
hadn't Disarmed or defeated Dumbledore. He had, admittedly, "killed"
Harry--with the Elder Wand--and come back from an AK. Good enough
reason to choose him over Draco, I would think.

Carol, who only meant to correct the point about the Elder Wand being
one of the three but typed the thoughts that entered her mind when she
touched the keys . . . .