I heard in one of your lectures, I dont remember which one so couldn't find it. You talked about human like creation before Adam. What are the islamic sources of that? It's something that appeals to atheists.

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Yes it’s this lecture:

https://youtu.be/jB3MXhYOy2k

The sources for this are our books of hadith such as the book of al-Kafi, which was compiled by al-Kulayni about 11 centuries ago.