> they fail to distinguish between terminal/differentiated cells and tissue stem cells I don’t distinguish them because what I’ve said is true both for differe

> they fail to distinguish between terminal/differentiated cells and tissue stem cells I don’t distinguish them because what I’ve said is true both for differentiated and stem cells. I’m not saying that there are no relevant differences between these cells, obviously. > they imply there is a one-to-one correspondence between the relevant cell divisions and number of total cells at any one time Uh, where did I imply that? That would obviously be false but, again, it’s not relevant to the argument I’m making. > The relevant number is divisions since the fertilized egg for each stem cell lineage. The relevant number for what? I was talking about the total number/size of cells at a given time, not the number of cell divisions, which is an entirely different (but also relevant) facet of tumourigenesis.