"Miss Granger there hasn't been a known soulbond ignited since the last wizarding war began, twenty years ago, I'm fairly certain out of the eight students here none of you will have one, let alone already in this room. Besides, I have never had one discovered in my class, wouldn't it be beneficial if you  did  discover one?" he smiled placatingly at her, "Now, turn to page seventy six and begin brewing!"