The unpardonable sin? Heliocentrism.
I like this blurb:
However, for both moral and theological reasons, we should always bear in mind that the Earth does not move. If it moved, we would feel it moving.This article is so bad, it even quote-mines Answers in Genesis! That's not easy to do. It quotes (seemingly in support of geocenticism) a paragraph from an AiG document in which the AiG is actually attempting to distance itself from those embarrassing geocentrists.