Marathoning through this thread is about as bad as marathoning the series itself!
Though experience with a certain 30,000 page thread of Asuki has steeled me for this battle.
I have a few points to raise, but I need to clarify something first, in case I missed it: Is present time being 1986 ever mentioned in red?
A little off-topic, but a funny thought:
Since the definition of a species is whether one can reproduce with another, the most
screw-up (lol) way to test if witches are not human would be for Battler and Beato/Vigil/Chibeat/whoever else you like to get it on in between board games, and see if the witches get pregnant. They got all infinity to wait for result anyway.
No contraceptives or measures against barrier to insemination must be undertaken during this mini-game. 