This is the most brilliant article using of venn diagrams ever. I’ve tried to do it, but my venn diagrams are horrible.
With regard to doubt, I would say the vast majority have not overcome doubt because of a lifetime search for wisdom, or some heavenly illumination. No, these are people who choose to be willfully ignorant, or use their “faith” as a weapon to bludgeon others.
I would try to create a venn diagram from this idea, but would probably fail again miserably.