User blog comment:Twilight Despair 5/Thule, Magic, and Possible Origin to Pagans./@comment-5115351-20130212022749/@comment-3481504-20130212191916

Lore in the show is canon, whether or not it aligns with lore in real life. For instance, in real life, Cherubs are the strongest type of Angels in existence, while in-verse, it's the Archangels. So, lore used in the show is canon, rather than lore in real life.

Also, in the show, characters can easily mistake wicthes to a being simply with magic, rather than it's actually definition - a human who practices magic, endowed by Demons. Fairies have magic, but they're not witches.