Contradiction with 2 Samuel 21:19
States that Elhanan killed Goliath, contradicting the account in 1 Samuel 17:51 where David kills Goliath.
2 Samuel 21:19: And there was again a battle in Gob with the Philistines, where Elhanan the son of Jaareoregim, a Bethlehemite, slew [the brother of] Goliath the Gittite, the staff of whose spear [was] like a weaver's beam. [Jaareoregim: or, Jair]
Paradox #1
One potential contradiction is that earlier in 1 Samuel 17, it is mentioned that David killed Goliath with a sling and a stone, while later it describes him cutting off Goliath's head with a sword. This can seem like inconsistent details about how Goliath was killed.
Paradox #2
The contradiction in that passage could be the idea of violence being justified or celebrated. It highlights a situation where defeating an enemy with lethal force is seen as a victory or righteousness, which may conflict with values of peace and non-violence.