#22 - Who was Amasa's father?
The skeptic's problem:
Amasa's father was Ithra an Israelite.
"Amasa was a man's son, whose name was Ishra and Israelite." 2 Samuel 17:25
Amasa's father was Jether an Ishmaelite.
"And the father of Amasa was Jether the Ishmaelite." 1 Chronicles 2:17
Jether and Ishra are variations of the name "Jethro", so can be reasonably inferred that these two men are the same man. Unfortunately, no satisfactory answer can be found as to why one source quotes him as an Ishmaelite, and the other as an Israelite.