Contradiction with Proverbs 12:22
Contradicts Luke 20:20's depiction of deceit as the verse condemns lying lips.
Proverbs 12:22: Lying lips [are] abomination to the LORD: but they that deal truly [are] his delight.
Contradiction with Matthew 5:44
Contradicts the malicious intent in Luke 20:20 by teaching to love enemies and do good to those who hate you.
Matthew 5:44: But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
Contradiction with Exodus 20:16
Contradicts the spies' action in Luke 20:20 by prohibiting bearing false witness against a neighbor.
Exodus 20:16: Thou shalt not bear false witness against thy neighbour.
Contradiction with Romans 13:10
Contradicts the harmful intentions in Luke 20:20 by stating that love works no ill to a neighbor and fulfills the law.
Romans 13:10: Love worketh no ill to his neighbour: therefore love [is] the fulfilling of the law.
Paradox #1
The contradiction or conflict in "Luke 20:20" might arise from the idea of deceit and manipulation. The verse describes people pretending to be sincere with the intention of trapping someone and getting them in trouble. This behavior conflicts with values of honesty and integrity.