Is this an example of a logical fallacy?
Regards,This is a logical fallacy known as "begging the question." In this case, the argument assumes the conclusion that eye witness testimony is unreliable, and then uses that assumption to conclude that the best evidence for the Book of Mormon is also unreliable. However, the argument doesn't actually provide any evidence to support the claim that eye witness testimony is unreliable in this specific case, or that the eye witness testimony for the Book of Mormon is unreliable. Instead, it simply assumes that eye witness testimony is generally unreliable, which may or may not be true in this particular instance.
PiAI
MG