Researchers from the independent Pew Forum on Religion phoned 3,400 Americans and asked them 32 questions about the Bible, Christianity, world religions, famous religious figures, and constitutional principles governing religion.
Those who scored the highest were atheists and agnostics. The results were the same even after the researchers controlled for factors like age and racial differences.
“I have heard... that atheists know more about religion...,” Mr. Silverman said. “Atheism is an effect of that knowledge, not a lack of knowledge...”
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