Why is the sin nature inherited?

[FallentoReason]

I think there's more to be explored within this discussion that was happening here:

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Actually no. Adam and Eve would still be running around naked. Without knoweledge of their nakedness, no babies.. (as it was before the fall)

Wait, so if "knowledge of nakedness" is necessary for reproduction, and this knowledge only comes once sins enters the world, then is sex sin? Something God designed is inherently sinful? Is that what you're implying?

Apparently in God's "perfect world" there would be no sex?

How many children did Adam and Eve have while living in the Garden?

Why? Because there was no need to reproduce and repopulate if they lived forever.

If you note Cain and Able did not come after the fall.

Seems rather weird that working reproductive organs would be given to them if they had no need to reproduce. Or was that a backup plan? God made a backup plan just in case he perfectly screwed up.

Or the Fall was always apart of said plan.. God know of the comming fall planed to populate the planet and then provide redemption for all of seek it. (john1)

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So God's plan was for A&E to be in a relationship with God forever while at the same time giving them reproductive systems for after the Fall? Ok, then:

1) God is malevolent, omnipotent and not omniscient, but instead has limited knowledge.
2) God is melevolent, omniscient and not omnipotent, but instead can't create whatever he desired.

Once again, your improvisation in discussion has lead to God being incompatible with himself. What's it going to be this time?