Contradiction with Romans 3:23
This verse states that all have sinned and fall short of the glory of God, while Psalms 50:6 speaks of God's righteousness and judgment, implying His perfection and human accountability, not universal sinfulness.
Romans 3:23: For all have sinned, and come short of the glory of God;
Contradiction with Ecclesiastes 7:20
This verse asserts that there is not a just man on earth who does good and does not sin, which contrasts with the righteousness of God depicted in Psalms 50:6 as the ultimate judge.
Ecclesiastes 7:20: For [there is] not a just man upon earth, that doeth good, and sinneth not.