Contradiction with Hebrews 11:31
While Joshua 2:18 recounts the instruction for Rahab to save her family with a scarlet cord, Hebrews 11:31 instead credits Rahab's faith, highlighting her belief as the reason for her family's salvation, not the specific action with the cord.
Hebrews 11:31: By faith the harlot Rahab perished not with them that believed not, when she had received the spies with peace. [that...: or, that were disobedient]
Contradiction with James 2:25
Joshua 2:18 emphasizes the physical act of leaving a scarlet thread as the method of protection, whereas James 2:25 praises Rahab for her deeds by hiding the spies, implying that her actions, not the cord, were pivotal.
James 2:25: Likewise also was not Rahab the harlot justified by works, when she had received the messengers, and had sent [them] out another way?
Paradox #1
The potential contradiction in Joshua 2:18 could be seen in the idea of promising protection to someone who has engaged in deception. The verse involves a situation where a promise of safety is given in return for helping Israelites, raising questions about whether it is morally right to reward deceitful actions with protection.