Contradiction with Proverbs 17:27
This verse suggests that "He that hath knowledge spareth his words," emphasizing the wisdom of speaking thoughtfully and sparingly, which contrasts with the reckless, harmful actions of a fool described in Proverbs 26:18.
Proverbs 17:27: He that hath knowledge spareth his words: [and] a man of understanding is of an excellent spirit. [an...: or, a cool]
Contradiction with James 3:17
This verse speaks of "the wisdom that is from above is first pure, then peaceable, gentle, and easy to be intreated," highlighting qualities of wisdom that are peaceful and gentle, in direct opposition to the destructive actions of a fool in Proverbs 26:18.
James 3:17: But the wisdom that is from above is first pure, then peaceable, gentle, [and] easy to be intreated, full of mercy and good fruits, without partiality, and without hypocrisy. [partiality: or, wrangling]
Contradiction with Proverbs 29:11
This verse states, "A fool uttereth all his mind: but a wise man keepeth it in till afterwards," contrasting the reckless behavior of a fool with the restraint and careful speech of a wise man.
Proverbs 29:11: A fool uttereth all his mind: but a wise [man] keepeth it in till afterwards.