Question: Who was the leading American Freethinker born who used the pseudonym M. Bible?
Sentence (from "Madalyn Murray O'Hair"): Madalyn Murray O'Hair ("née" Mays; April 13, 1919 – September 29, 1995), who also used multiple pseudonyms (her most preferred being M. Bible), was an American activist, founder of American Atheists, and the organization's president from 1963 to 1986.
Relevant evidence: Yes