Contradiction with Exodus 20:5
This verse speaks of God visiting the iniquity of the fathers upon the children, contrasting with Genesis 9:16 which emphasizes God's covenant of mercy.
Exodus 20:5: Thou shalt not bow down thyself to them, nor serve them: for I the LORD thy God [am] a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth [generation] of them that hate me;
Contradiction with Ezekiel 18:20
This verse states that a son shall not bear the iniquity of the father, contradicting the idea of generational punishment outlined earlier.
Ezekiel 18:20: The soul that sinneth, it shall die. The son shall not bear the iniquity of the father, neither shall the father bear the iniquity of the son: the righteousness of the righteous shall be upon him, and the wickedness of the wicked shall be upon him.
Contradiction with Hebrews 8:12
This verse mentions God's promise to be merciful to unrighteousness and to not remember sins, contrasting with the earlier notion of punishment for sins.
Hebrews 8:12: For I will be merciful to their unrighteousness, and their sins and their iniquities will I remember no more.
Paradox #1
The contradiction or conflict in that verse could be the idea of a covenant or promise being remembered only through a sign, which might imply that without the sign, the promise could be forgotten. This could conflict with the belief in an all-knowing, all-remembering deity.