Did Dumbledore know who the HBP was?

[PeerlessKid]

Yh that's interesting it was in the cabinet in his classroom this whole time. Surely when Snape was potions master he went through the cupboards and well act like a normal teacher. He would have come across it.
Or... do you guys think that he knew it was there, kept it through all these years and still uses the book?

[VernonDudley]

I don't think it would've mattered if Dumbledore knew the book or not.

[LudwigVan]

I think Dumbledore didn't know Snape was the HBP. Although i do think that Dumbledore started suspecting something when Harry made the Sectumsempra on Malfoy. I think he knew Sectumsempra was Snape's "mark".

[_0XHermioneX_]

I didn't think Dumbledore knew who the HBP was. Because, in the book it never did tell us if Dumbledore knew anything about it. And Harry didn't tell him about it, did he? So I reckon he never knew.

[RaynePhoenix]

I doubt Snape ever told anyone of his nickname when he was at school. If voldemort was becoming stronger by the day, no one would want to admit they were Half Blood or less. I think he was using the nickname, as previously said, to disregard his muggle father.
As to Dumbledore knowing, I doubt he had ever heard of the nickname while Snape was still a student, but he would have known about 'Sectumsempra' after Harry's use of it on Malfoy. I don't know if Dumbledore would have known that Snape was the Half Blood Prince, although he may have known Snape's mothers maiden name was Prince.

[PeerlessKid]

Most of you people said that Dumbledore would have known that Sectumsempra was Snape's 'mark'. But how do we know that for sure? We don't know if Dumbledore knows, nor do we know that Snape ever told Dumbledore about it. So we can't assume that can we?