Yes, I am familiar with Adam-Ondi-Ahman. We believe it to be near the site of the Garden of Eden.
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I grew up in Northern Missouri. Eden it is not. I suppose for someone like Smith, who was raised in frigid upstate NY, it might have seemed so, but it is not a place where Adam and Eve would have been able to frolic about in their birthday suits. It is way below freezing at least three months of the year, and hotter than the hinges of Hades in the summer.