Contradiction with Proverbs 26:11
This verse suggests that fools inevitably return to their folly, contradicting the call in Proverbs 8:5 for the simple to gain wisdom and the foolish to gain understanding.
Proverbs 26:11: As a dog returneth to his vomit, [so] a fool returneth to his folly. [returneth to his folly: Heb. iterateth his folly]
Contradiction with Ecclesiastes 7:25
This verse indicates an arduous quest to understand folly and the foolishness of madness, suggesting that gaining understanding is not as simple as Proverbs 8:5 portrays.
Ecclesiastes 7:25: I applied mine heart to know, and to search, and to seek out wisdom, and the reason [of things], and to know the wickedness of folly, even of foolishness [and] madness: [I applied...: Heb. I and mine heart compassed]
Contradiction with 1 Corinthians 1:27
This verse claims God chose the foolish things of the world to shame the wise, which contradicts the notion in Proverbs 8:5 of the foolish needing to gain understanding.
1 Corinthians 1:27: But God hath chosen the foolish things of the world to confound the wise; and God hath chosen the weak things of the world to confound the things which are mighty;