Even then it would be 'known unknowns' to him as compared 'unknown unknowns'. It is big deal considering we just saw Marissa Meyer who was at center of creation

Even then it would be 'known unknowns' to him as compared 'unknown unknowns'. It is big deal considering we just saw Marissa Meyer who was at center of creation of a web scale system proved out of depth at slightly different web scale system.