Contradiction with Exodus 33:20
Contradicts Luke 9:30's depiction of Moses appearing alive, as Exodus 33:20 suggests no man can see God and live, implying different views on experiencing God's presence.
Exodus 33:20: And he said, Thou canst not see my face: for there shall no man see me, and live.
Contradiction with John 3:13
Contradicts the idea of Moses appearing from heaven in Luke 9:30, as John 3:13 states no one has ascended to heaven except Jesus.
John 3:13: And no man hath ascended up to heaven, but he that came down from heaven, [even] the Son of man which is in heaven.
Contradiction with Ecclesiastes 9:5
Suggests the dead know nothing, contradicting the notion in Luke 9:30 that Moses, who had died, could interact and know events enough to appear.
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.