Karpathy says evolution appears to encode neural-network weights in genetic material, while acknowledging that he does not know how the process works.

“um that's not reinforcement learning that's something that's baked in and evolution obviously has some way of encoding the weights of our neural nets in attcg's and i have no idea how that works but it apparently works so i kind of feel like brains just came from a very different process and i i'm very hesitant to take inspiration from it because we're not actually running that process so in my post i kind of said”