This is true even on the micro level of HN karma points. I find myself wondering why certain comments or submissions get voted way up more than others. I think

This is true even on the micro level of HN karma points. I find myself wondering why certain comments or submissions get voted way up more than others. I think a lot of it has to do with the fact that our brains evolved to discover relationships so we have this innate drive to explain and prove what we experience so that we can replicate it as we feel our survival depends on our ability to do so.