Contradiction with Genesis 3:11
Genesis 20:10 involves questioning Abraham's actions regarding Sarah, similar to God questioning Adam about eating from the tree he was commanded not to eat. The contradiction lies in human understanding and disobedience.
Genesis 3:11: And he said, Who told thee that thou [wast] naked? Hast thou eaten of the tree, whereof I commanded thee that thou shouldest not eat?
Contradiction with Genesis 12:11-13
God had previously made promises to Abraham, yet Abraham deceives Abimelech just as he did in Egypt, showing a recurrence of actions that should have been learned from.
Genesis 12:11-13: And it came to pass, when he was come near to enter into Egypt, that he said unto Sarai his wife, Behold now, I know that thou [art] a fair woman to look upon:
Contradiction with Genesis 17:17
Abraham laughed at God's promise of a son at his old age, showing his doubt and contradiction between his faith in God and the way he sometimes acted out of fear or deception.
Genesis 17:17: Then Abraham fell upon his face, and laughed, and said in his heart, Shall [a child] be born unto him that is an hundred years old? and shall Sarah, that is ninety years old, bear?
Contradiction with Exodus 20:16
This verse commands not to bear false witness, which contradicts Abraham's deception about his relationship with Sarah in Genesis 20:10.
Exodus 20:16: Thou shalt not bear false witness against thy neighbour.