Contradiction with Exodus 14:4
Contradiction that Pharaoh's heart is already hardened beforehand, suggesting pre-determined actions rather than regret.
Exodus 14:4: And I will harden Pharaoh's heart, that he shall follow after them; and I will be honoured upon Pharaoh, and upon all his host; that the Egyptians may know that I [am] the LORD. And they did so.
Contradiction with Exodus 4:21
God states He will harden Pharaoh's heart, suggesting divine intervention, not Pharaoh's own change of mind.
Exodus 4:21: And the LORD said unto Moses, When thou goest to return into Egypt, see that thou do all those wonders before Pharaoh, which I have put in thine hand: but I will harden his heart, that he shall not let the people go.
Contradiction with Exodus 7:3
Again emphasizes God's role in hardening his heart, not Pharaoh's regret or decision.
Exodus 7:3: And I will harden Pharaoh's heart, and multiply my signs and my wonders in the land of Egypt.
Contradiction with Romans 9:17-18
Highlights God's purpose to show power, implying actions were not by Pharaoh's own choosing.
Romans 9:17-18: For the scripture saith unto Pharaoh, Even for this same purpose have I raised thee up, that I might shew my power in thee, and that my name might be declared throughout all the earth.