If by "knowing", it means knows how one's traits compare with others, yes, we can know it better than oneself. Because that's exactly what the science of psycho

If by "knowing", it means knows how one's traits compare with others, yes, we can know it better than oneself. Because that's exactly what the science of psychometrics does, and we are now applying it at a larger scale. Please look at http://juji.io/resources http://juji.io/resources for a list of references this project builds on.