Contradiction with James 5:12
Joshua 9:20 instructs to honor an oath once it's made, while James 5:12 advises letting your "yea" be "yea" and "nay" be "nay," avoiding oaths altogether.
James 5:12: But above all things, my brethren, swear not, neither by heaven, neither by the earth, neither by any other oath: but let your yea be yea; and [your] nay, nay; lest ye fall into condemnation.
Contradiction with Matthew 5:37
Joshua 9:20 allows for keeping an oath made under deception, whereas Matthew 5:37 emphasizes straightforward communication without the need for swearing.
Matthew 5:37: But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.
Contradiction with Proverbs 26:24-25
Joshua 9:20 supports keeping an oath regardless of truth, but Proverbs 26:24-25 warns against trusting deceitful words, suggesting discernment.
Proverbs 26:24-25: He that hateth dissembleth with his lips, and layeth up deceit within him; [dissembleth: or, is known]
Contradiction with Matthew 5:34
Joshua 9:20 involves swearing falsely but maintaining the oath, while Matthew 5:34 instructs not to swear at all.
Matthew 5:34: But I say unto you, Swear not at all; neither by heaven; for it is God's throne:
Paradox #1
The contradiction or inconsistency could be related to the theme of keeping one's word versus dealing with deception. In Joshua 9:20, the Israelites decide to honor an oath made under false pretenses to the Gibeonites. This raises questions about whether honesty and truth should override a promise made, or if keeping a vow is more important, even when acquired through deceit. This situation might seem inconsistent with other teachings that emphasize truthfulness and honesty.