The most usual way in which we measure educational attainment/knowledge is by seeing what degree(s) a person has. However, it seems that a number of people are in a similar situation to myself. I am an independent learner. While I have around 11,000 hours of formal education completed, I am interested in learning, not obtaining pieces of paper.
Unfortunately that usually translates as meaning that I am not well educated, even though I have spent more time completing formal coursework than someone who holds a straight Ph.D. Furthermore, a Ph.D. is just an indication that a person has a lot of knowledge on a very narrow field of study. It does not in many way measure breadth of knowledge or experience.
Both of these issues seem rather concerning. At the very least, I think that the academic community should realize that a lack of a Ph.D. does not imply any level of intellectual or educational inferiority, and that a person may have a greater amount of education that does not translate to a single degree.
Perhaps the concept of "mathema" discussed in this paper could help: Book Polymathy: A New Outlook