Contradiction with Proverbs 25:9
Proverbs advises discussing matters privately rather than avoiding an answer, as Jesus did with the elders by not telling them by what authority he does his works.
Proverbs 25:9: Debate thy cause with thy neighbour [himself]; and discover not a secret to another: [a secret...: or, the secret of]
Contradiction with Proverbs 11:13
This verse promotes revealing truth rather than hiding it; Luke 20:8 shows Jesus withholding information.
Proverbs 11:13: A talebearer revealeth secrets: but he that is of a faithful spirit concealeth the matter. [A talebearer: Heb. He that walketh, being a talebearer]
Contradiction with Matthew 5:37
Encourages clear communication ("Yes, yes" or "No, no"), in contrast to Jesus avoiding a direct answer in Luke 20:8.
Matthew 5:37: But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.
Contradiction with 1 Peter 3:16
Emphasizes giving an answer with meekness and fear, contrasting with Jesus refusing to answer the elders' question.
1 Peter 3:16: Having a good conscience; that, whereas they speak evil of you, as of evildoers, they may be ashamed that falsely accuse your good conversation in Christ.
Contradiction with James 5:12
Advises against swearing oaths and promotes straightforward answers, in contrast to Jesus' response of not answering directly.
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.