Secular, Atheist, and Agnostic | Merriam-Webster
https://www.merriam-webster.com/grammar/what-do-secular-atheist-agnostic-mean
webThough atheist and agnostic are words that are often used together or cited in similar contexts, they do not mean the same thing. Agnostic comes from the Greek word meaning "unknown" or "unknowable" (a-, "not" or "without," and gnōstos, meaning "known"). It means "a person who does not have a definite belief about whether God exists or not" or ...
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