Ahh, that is an important distinction. Factoring this in could help one avoid stepping on a theological landmine. I doubt it is the only one on this issue. Perhaps it would be best not to get into too much detail telling theologians the historical position on the transmission of original sin.
I do think it is important to stress that none of us are challenging the doctrine of original sin itself. The question is the method by which sin and true death is transmitted given that there was a population of humans outside the garden. The research of Dr. Swamidass suggests that inheritance is not ruled out as a mechanism so long as the appropriate events are at least 6,000 years ago. Those are the facts. What is made of them regarding the question of transmission should be up to the theologians to decide after taking a fresh look at the text in view of a population outside the garden.