I think it is possible by making it very costly to not be human. For example: tracking whether and how you type (copy paste = instant flagged, perfect typing, no corrections in perfect speed = bot behavior, etc) If you type naturally like a human, you can flag it authentic or boost it. Also: there's a browser extension readup.org, it tracks how you read a text, if you haven't scrolled in a human way, or skipped reading, you CANNOT comment. Nostr is perfectly positioned to make it costly to comment or like. If something is really worth commenting and you have something worth saying, you will be willing to pay a micro transaction for it. Should be too costly for large bot nets. Affordable enough for humans so that you contribute meaningful comments to where you actually feel that you have something worth contributing to. If you do, you will likely regain the microtransaction you paid for commenting through likes/zaps.