PAA
:??????? ??
One Rashi refers to ????? ????????? and ????? ???????. That says that they’re Jewish.
Another Rashi says “???? ???? ??”
That one solves at complicates your Rosh Chodesh idea, and might solve your syllogism.
Also, your proof from yevamos is lav davka– He is not a man, but that doesnt automatically make him a child. Maybe he isnt a man because his bones melted?
Or he(it?) is an androgonynous and is now married to him(it?)self