Sounds to me like he disagrees with the idea that bacteria and archaebacteria arose independently, rather than saying that the whole thing is "impossible". No?Yes, but we are speaking of one hypothesis. I believe it comes as a package, Fool's gold and bugs.
Placemarker.
Hmmm. I suppose we'll have to wait for some clarification to know for sure, but it seems pretty clear to me. Oh, well.