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

Plot hole: When Malfoy gets into trouble while trying to catch Harry with Norbert, Professor McGonagall dismisses his claims as "utter rubbish", and a "cock and bull story." To prove his story was true, Malfoy could have shown her the letter Ron received from his brother Charlie (which Malfoy accidentally received when he borrowed a book from Ron), which detailed their plan to deliver Norbert to Romania.

Cubs Fan

Plot hole: On page 56 of the original UK edition, Harry overhears a witch complaining about the price of something as being "seventeen Sickles." There are seventeen Sickles to a Galleon, so a witch who is familiar with the Wizarding world (as she obviously is, given that she knows that price to be unusually expensive) would say "one Galleon" instead. This was changed to "sixteen Sickles" in later editions for this reason. Page 72 in the American version.

Factual error: When Harry is with the Dursleys in the run-down shack, he realises that Tuesday is his birthday. However, in 1991, July 31st was a Wednesday.

Other mistake: On page 221 of the American hardcover, the third paragraph begins "...wished him luck outside the locker rooms the next afternoon." But Harry couldn't have just been getting to the locker room in the afternoon; Quidditch matches take place in the late morning: the school teams are usually dressed and already on the pitch by 11:00 am.

Cubs Fan

Question: This question is for all the novels. How are all the schools in the wizarding world kept hidden from the muggle world? Surely if a plane were to fly over Hogwarts, people would be shocked at seeing people flying around on broomsticks and using magic.

Answer: The International Statute of Wizarding Secrecy is in charge of hiding the general wizarding community from the Muggle world. As for many of the wizarding schools such as Hogwarts, their use of multiple Concealment Charms provide the necessary protection to creatively conceal them from Muggle view.

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Also, Muggles usually don't "want" to see magic. Most of them are too convinced that magic is not real. A Muggle might see the occasional wizard/witch fly high above them on a broom, and assume they imagined it.

Answer: There are special spells at work to hide the schools and other places from muggles. In Deathly Hallows for example you can see Hermione cast a few when they are in the woods. An example is "Repello Muggletum", which is a barrier that causes Muggles who hit it to forget they were there and turn around.

lionhead

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

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