Those are not legitimate scenarios. If the Lord had intended for sin to not become a reality, then that tree and that serpent would not have been in the garden. The Lord knew Satan was going to become prideful and fall, just as He knew man would choose disobedience and sin. Given all that, there were not other alternatives that would ever have been possible. Many people I have met love to imagine the world had sin not entered it, and that scenario is vain because it did not move in the direction of God's ultimate outcome.
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