Contradiction with Proverbs 26:4
This verse advises not to answer a fool according to his folly, implying times when speaking might not be righteous, which can contradict the notion of Proverbs 8:6 to speak excellent and right things.
Proverbs 26:4: Answer not a fool according to his folly, lest thou also be like unto him.
Contradiction with Ecclesiastes 3:7
This verse suggests there is a time to keep silence, which can contradict the idea of always speaking excellent and right things as encouraged in Proverbs 8:6.
Ecclesiastes 3:7: A time to rend, and a time to sew; a time to keep silence, and a time to speak;
Contradiction with James 3:8
This verse states that no man can tame the tongue which can contradict the assurance of speaking righteousness and truth in Proverbs 8:6.
James 3:8: But the tongue can no man tame; [it is] an unruly evil, full of deadly poison.
Contradiction with Proverbs 15:1
This verse suggests a soft answer turns away wrath, which can contradict the firm righteousness implied in "excellent things" of Proverbs 8:6.
Proverbs 15:1: A soft answer turneth away wrath: but grievous words stir up anger.
Contradiction with Proverbs 17:27
This verse promotes using fewer words to show understanding, contradicting the directive to speak excellent things constantly as in Proverbs 8:6.
Proverbs 17:27: He that hath knowledge spareth his words: [and] a man of understanding is of an excellent spirit. [an...: or, a cool]