this post was submitted on 23 May 2025
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Harry Potter

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In retrospect... (sh.itjust.works)
submitted 1 week ago by threelonmusketeers@sh.itjust.works to c/harrypotter
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[–] threelonmusketeers@sh.itjust.works 1 points 5 days ago* (last edited 5 days ago)

It's weird he didn't share that knowledge when he was potions teacher though.

I've always assumed that he did. Unlike Slughorn, Snape didn't teach out of the book, and always hand-wrote the potion instructions on the board. I assume that these instructions included his own additions and improvements that he had discovered over the years.