In mathematics, in physics, people are concerned with what you say, not with your certification. But in order to speak about social reality, you must have the proper credentials, particularly if you depart from the accepted framework of thinking. Generally speaking, it seems fair to say that the richer the intellectual substance of a field, the less there is a concern for credentials, and the greater is concern for content.
Noam Chomsky
autodidacticism, credentialism, credentials, intellectual, intelligence, math, mathematics, physics, science, self-education