learning while getting your PhD is maybe 1&#x2F;10 learning from classes and 9&#x2F;10 creating new knowledge and reading papers; I think I am being generous to classes here.  You become the world expert by going extremely deep in a very narrow topic and actually creating the knowledge around the topic.  You don&#x27;t need to be a PhD candidate to do this.<p>For credibility, I was a Computer Science PhD candidate 4 years ago.