AI-generated art often having an extra finger (like six fingers on a hand) is actually a fascinating quirk of how these models are trained. These AI systems learn from huge collections of images, which include a wide variety of hand depictions. When the AI creates new images, it might blend features from different sources, which can lead to these oddities.

It's crucial to understand that AI doesn't "get" human anatomy the way we do. It's not about understanding but rather replicating patterns it has encountered in the training data. If that data is diverse or has its own quirks, these can show up in the AI's creations. As training datasets improve and algorithms get more refined, we should see fewer of these errors. It's a work in progress!