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We must come to the right conclusion.

I agree. But on an issue such as this, since we don't have enough information, even from Scripture (because people are interpreting the same passage multpile ways here at times) than we don't know the correct conclusion, so we do the best that we can.

Also, salvation doesn't hinge on what we think about whether infants are damned or not. If GOd wanted us to know exactly, He'd have exactly said. He did tell us exactly what we need to know, though. That some infants in Scripture were rgenerated in the womb and David had hope he'd see his again.

If we are truly trusting God for the answer to this delimma, than, when the time comes for us to counsel that mother who just lost her baby, God will give us the correct words and actions to help her deal.