Welcome to Harry Potter Theory. This is part 1 of a video series where I'll be diving in to the Harry Potter books and taking a look, chapter by chapter, at all of the mistakes that were made. Starting with book 1: Harry Potter and the Philosopher's Stone.

I'm going to be placing a particular focus on instances in which factual errors were made or canon was somehow contradicted. Trivial errors like typos / grammatical issues will not be focused on this video.

I should also mention that I'm not making this video to CRITICIZE the books, but rather, take a look out of my own curiosity. Authors are only human and nearly every book series has mistakes like these made in them.

Rowling has even addressed this topic herself:

"As obsessive fans will tell you, I do slip up! Several classrooms move floors mysteriously between books and these are the least serious continuity errors! Most of the fansites will point you in the direction of my mistakes. But the essentials remain consistent from book to book because the story has been plotted for a long time and it is clear in my mind."

In the interest of time, I'm also only going to briefly summarizing each mistake as there's quite a lot of ground to cover.-

Starting...With the COVER of the very first book.