This also demonstrates the absence of critical thinking based on observation. For those who think the moon glows by it's own light, how do they explain the terminator? It moves constantly, it's not as if the same hemisphere of the moon is always illuminated like an electrical fixture. Have none of them ever faced the setting sun, and held a tennis ball up to cover a waxing crescent moon, only to notice that it exhibits the exact same crescent? The answer is that many of them have, many of them do know better but are in severe denial. To admit that one passage of scripture is in error means that the entire body of work cannot be literal, divine truth, and many fundamentalists define themselves in large part by their faith. If their faith isn't firm, their sense of self crumbles. They are not capable of adapting to new information. To them, rational argument isn't civil debate, it's an attack. Their only defense is utter denial.