Related Clues:

• Madalyn O'Hair, e.g.
• Deity discreditor
• Motive questioner
• Evangelist's target
• Undecided
• Misanthrope
• Negative sort of person
• He's beyond belief
• Uncommitted
• Isaac Asimov, notably
• Lacking faith in God
• Diogenes, notably
• Nonbeliever
• Doubting Thomas
• Greek philosopher