Contradiction with Matthew 22:29
This verse suggests that people err by not knowing the scriptures or the power of God, whereas Luke 20:39 shows some acknowledging the wisdom in Jesus' reply.
Matthew 22:29: For in the resurrection they neither marry, nor are given in marriage, but are as the angels of God in heaven.
Contradiction with Mark 12:24
Here, Jesus implies a misunderstanding of scriptures, contrasting with the affirmation found in Luke 20:39.
Mark 12:24: And Jesus answering said unto them, Do ye not therefore err, because ye know not the scriptures, neither the power of God?
Contradiction with 1 Corinthians 2:14
Indicates that spiritual truths are not understood by the natural man, conflicting with the scribes' understanding in Luke 20:39.
1 Corinthians 2:14: But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know [them], because they are spiritually discerned.