|"There are plenty of eye-witness accounts. Just because you're so narrow-minded you need to have everything shoved under your nose before you–"
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Mudbloods and How to Spot Them was a book by Barrett Fay which presumably contained propaganda supporting discrimination against Muggle-born witches and wizards. Dolores Umbridge kept a copy in her desk at the Ministry of Magic's Senior Undersecretary to the Minister for Magic's office in 1997.
- Harry Potter and the Deathly Hallows: Part 1 (First appearance)