P1: The penalty for Adam’s sin is Adam’s eternal damnation.
P2: Adam’s punishment for his sin could be paid for only by a sinless redeemer.
P3: Christ was sinless until he redeemed Adam by taking on Adam’s sin.
P4: Christ, having taken on Adam’s sin, is no longer a candidate sinless redeemer.
P5: Christ could not have paid for the sins of more than one human. (P1, P2, P3 & P4)
P6: There are billions of sinners in the world needing a sinless redeemer.
CONCLUSION: Christ did not pay for the sins of the whole world. (P5 & P6)
Christ had to die a human death to redeem humans. But Christ had only one human death to offer. And how could he have been resurrected after 3 days if the wages of the sins of those he came to redeem is a death longer than 3 days? Absurd.