mamund, How Dopamine Deciphers Learning in the Brain
https://neurosciencenews.com/dopamine-reward-learning-25367/
"Imagine you’re teaching a dog to play fetch. You throw a ball, and your dog sprints after it, picks it up, and runs back. You then reward your panting pup with a treat. But now comes the real trick for your dog: figuring out which part of that sequence earned the treat." -- #PeterKim