But because these are my favorite too-drunk-at-a-bar conversations I wanna give it a crack. Here's a couple things I think require human experimentation
1. Creative a definitive best-practice guide to child rearing. I.e., hitting yes/no? Shouting at yes/no?
2. Fully understanding primitive/baseline human psychology absent of culture, which could help us understand if there is for example biological morality, how to teach language, how languages form. Can't see how to do this without abandoning a child in the wilderness.
3. Determining best-case formula for human tribal organization. I.e. what's the most effective leadership traits, organizational schemes, rule enforcement mechanisms... Could be figured out with Vaults ;)
4. Is post-death ressurection possible and at what point? I suppose you can get consent before death, but does that count when that individual terminates?
Can you think of any more? What are your thoughts on what would be "worth it?"