"I do not know how many parts a soul can be divided into." Dumbledore replied. "But even if he only made two Horcruxes it means his soul is in three parts already."
"No sir. That's not right." Hermione replied and her eyes flew open wide and she blushed as she realized she had just corrected the Headmaster.
Dumbledore looked at the witch for a second before. "Please explain what you mean by that."
Hermione looked embarrassed but explained what she had thought. "Sir, the…I mean our source said when you murdered someone it splits your soul into two pieces. Left alone they will eventually bind back together, but someone intent on making a horcrux would perform the magic required to remove half of the soul and place it in the container they had prepared."
"Yes that is how it works." Dumbledore said.
Hermione thought her next statement was obvious but she said it anyway. "Sir, if you split your soul into two pieces, then in your first horcrux you would have half of your soul, but in your second one you would put only a fourth of your soul. So I guess technically if you made two horcruxes it would be in three parts, but three unequal parts. He would only have a quarter of his soul left to him."
Dumbledore eyes never gave away the inner thoughts that now started growing exponentially. Now that she had said it, it made obvious sense but not something he had considered before. He immediately started thinking of the transformation of the handsome young man Tom Riddle had been into the 'thing' he had become later in life, becoming more snake than man. Dumbledore had presumed Riddle's appearance change had occurred because of the dark arts he had delved into, but now it was possible if not probably that he became what he was or is because he had so little of his soul left. He then looked up from his musings and realized there were five sets of eyes looking at him.
"I think you may be right Miss Granger." Professor Dumbledore replied. "It is something I had not considered."