IanS
OK, thank you. Wells read what is now a 50 year-old report from a pathologist who did not examine the body he is describing. So, when we read scare-quotes around "impossible," ...
The eye-witness also apparently saw blood and water come out from the stabbing wounds. Though afaik, modern medicine agrees that cannot have happened because it is medically “impossible”.
... we can be confident that the quotation marks are well justified. And, "modern medicine" didn't agree with this pathologist, Wells did.
The passage being questionned is from the
Gospel of John (whether the epistle is written by the same author is disputed). It says only that water and blood came out (
exelthen) immediately (
euthys). There's no characterization of the quality of flow, oozy, gushy, ... There's no discussion of whether there was separation of blood and water, as opposed to what might appear to be diluted blood - no details at all except that there was a spear-piercing and something wet and bloody came out without delay.
The evangelist's point in mentioning the witness appears to be that there should no question that the hero was dead at that point. Throughout the Gospels, it falls to Roman military expertise to assure the reader of this plot point.
John's innovation is to provide methodological detail, displaying our experts being good sceptics and actively testing their hypothesis. This was not a "scratch test," but a real stabbing. Dude is dead, barring a miracle in its own right.
I am also unsure what the discussion of baptism is supposed to add to this. It is uncontroversial that John the Baptist practiced some version of the ritual independently of Jesus, and that Paul had practiced ritual baptism before there were any Gospels.
John's watery detail, then, appears to come too late to have any influence on the usage or interpretation of the ritual. The combination of "water" (amniotic fluid) and blood is typical of childbirth. However, as can hardly be surprising in a ritual that was popular with Jews, there never was any blood in baptism - whatever the "born again" rhetoric may have been surrounding it.
Eucharistic wine is typically watered wine, and that ritual detail may resonate here. However, watered is how wine was typically drunk at the time - unwatered wine being the "strong drink" of the disreputable. Since Paul attests to the ritual being observed, it seems likely that people were toasting Jesus with watered wine long before
John was available to them.
In any case, the witness is not impeached because he characterized some gore as runny.