Contradiction with Genesis 6:19
Genesis 6:19 says that Noah is to bring two of every sort, but it doesn't specify exactly how they're to come, whereas Genesis 7:9 specifies they came to Noah by twos.
Genesis 6:19: And of every living thing of all flesh, two of every [sort] shalt thou bring into the ark, to keep [them] alive with thee; they shall be male and female.
Contradiction with Genesis 7:15
Genesis 7:15 states they went into the ark two and two of all flesh that had the breath of life, aligning closely with 7:9, so it's not a contradiction but a reinforcement of the same event, illustrating the difficulty in finding direct contradictions to this specific verse.
Genesis 7:15: And they went in unto Noah into the ark, two and two of all flesh, wherein [is] the breath of life.
Paradox #1
A contradiction or inconsistency related to Genesis 7:9 could involve the logistical challenge of gathering two of each kind of animal from across the entire world and bringing them to Noah's Ark. This raises questions about the feasibility of such an event, given the vast number of species and the geographical distribution of animals, which would have posed significant challenges in terms of time, distance, and resources required.
Paradox #2
The contradiction could be the concept of all animal species entering an ark, as described in the verse. Logistically and biologically, gathering pairs of every animal species from around the world and housing them on a single vessel for an extended period presents challenges in terms of space, diverse dietary needs, and ecological preservation. This scenario doesn't align with our current understanding of biodiversity, ecosystems, and animal behavior.