Harry: "He made seven Horcruxes?"
Dumbledore: "...Not seven Horcruxes: six. The seventh part of his soul, however maimed, resides inside his regenerated body..." (HP6, US Hardback, page 503).
I would think that Dumbledore had already known that there were 6 horcruxes:
- the diary
- gaunt's ring
- salazar's locket
- helga hufflepuff's cup
- nagini (the whole essence divided thing)
Now those are the five that he was sure of. He knew that when Riddle came to Hogwarts to ask for the DADA position, he was really there so he could hide a horcrux. (But he never got a chance to tell Harry that, right?) Did Dumbledore know of the diadem? Or did he just think Riddle wanted to hide the cup?
Did Dumbledore say there were 6 and not 7 because he didn't know about the diadem but did know about Harry being a horcrux? Or did he say there were 6 to ensure Harry didn't guess he was a horcrux? Sorry if this makes no sense.
I know that in the end there were 7 horcruxes and an 8th part of Voldemort's soul right?