BTW, there is also zero evidence that Mark Twain was ever a Unitarian. Nor Lincoln, if that is the claim that crackpot site is making.
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That site was a unitarian site. (not to make too fine a point of it but that's why I had several references of varying repute -- to Melville's Unitarianism.) In any case its good you call the unitarian source crackpot. Its likely Twain Didn't go to church at all. I don't know about lincoln. Here's a
wikipedia list of famous unitarians. the list includes melville, emerson and thoreau.(but not twain or lincoln--so good catch)
"Its likely Twain Didn't go to church at all. I don't know about lincoln."
Twain went to a Presbyterian church and never "renounced" Presbyterianism as far as I know.
Nobody knows about Lincoln's true religious beliefs. Not even his closest friends. He was completely and obdurately silent about them.