HackerNews has an upvote/downvote system scored by the community, with points which affect capabilities on the site. You are absolutely responding in a way whi

HackerNews has an upvote/downvote system scored by the community, with points which affect capabilities on the site. You are absolutely responding in a way which is appealing to the fitness function imposed on you - we all are. And that's the simple, very mechanistic one that's easy to point to.