Continuity mistake: Harry buys the book "One Thousand Magical Herbs and Fungi", but later, the title changes to "One Hundred Magical Herbs and Fungi".

Continuity mistake: While being sorted into houses, Harry looks up at the Sorting Stool, and there are only three people left to be sorted. Professor McGonagall then calls out the names of four more kids.

Factual error: On page 25, it mentions that the boa constrictor at the zoo winked at Harry. Snakes don't have eyelids at all, so it's impossible for them to wink.

Issabee

More mistakes in Harry Potter and the Philosopher's Stone

Answer: Yes. J.K. Rowling was going to give Hermione a younger sister who was a muggle. However, by the time "Harry Potter and the Order of the Phoenix" came out, she felt that it was too late.

Question: Has it ever been explained what happens to a wizard/witch if they don't repay a life debt? Harry should owe one to Snape after Snape rescues him from Quirrell's curse during the Quidditch game, but he never does throughout the series.

Answer: It does not appear that life debts automatically form whenever somebody saves somebody else - J K Rowling has, for example, stated that Ginny did not incur a life debt to Harry when he saved her in the Chamber of Secrets, although she said nothing about what circumstances need to occur for a debt to exist. In Snape's case, there would seem to be several possibilities. 1) A life debt simply didn't form. 2) Snape is protecting Harry because of his love for Lily and his failure to save her, so he may actually be paying off a debt of sorts himself by doing so. 3) Harry's father James saved Snape from almost certain death when Sirius tried to trick him into going into the Shrieking Shack when Remus Lupin was in his wolf form. As such, Sirius may have owed James a debt, which he paid off by saving Harry. 4) A life debt did form but, as Snape died before Harry could pay it off and, insofar as we know, had no relatives that the debt could pass to, Harry was let off the hook.

Tailkinker

Question: After the incident at the zoo, on Dudley's birthday, Harry is restricted to his cupboard until after the summer holidays start (see beginning of Chapter Three). If Dudley's birthday is before the holidays, then why does Mrs. Figg normally watch Harry that day (except this year)? Any year when Dudley's birthday was not on a weekend, Harry could have simply gone to school as usual.

Answer: Harry has already experienced a few magical incidents, as children from Muggle families usually do. For example, changing a teacher's wig hair to a blue color. If Dudley's birthday is on a school day, his parents probably don't want the risk of a problem at school. It's easier to make Harry stay with Mrs. Figg all day.

Answer: As I recall, Mrs. Figg had broken her leg so she was unable to watch Harry. The Dursleys were then forced to take Harry to the zoo for Dudley's birthday.

raywest

That is not the question. The question is why she has been watching Harry every other year, except for this time (due to her injury). If Dudley's birthday happens before the summer holidays begin, why has she been watching Harry during the years when Dudley's birthday is a school day? Harry could have just gone to school.

Thank you for clarifying as your original question was rather confusing. I was assuming that Dudley's birthdays were not celebrated on an actual school day, but later on the weekends and that is why Mrs. Figg watched Harry. I don't think Dudley would be staying home from school every year on his B-Day.

raywest

More questions & answers from Harry Potter and the Philosopher's Stone

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