Contradiction with Ecclesiastes 9:5
Ecclesiastes states that the dead know nothing, contradicting the notion of resurrection in 1 Corinthians 6:14.
Ecclesiastes 9:5: For the living know that they shall die: but the dead know not any thing, neither have they any more a reward; for the memory of them is forgotten.
Contradiction with Psalm 88:10
This verse questions whether the dead will rise to praise God, seeming to contradict the assurance of resurrection in 1 Corinthians 6:14.
Psalm 88:10: Wilt thou shew wonders to the dead? shall the dead arise [and] praise thee? Selah.