The Docetists, Manicheans, Sabellians, Gnostics, Arians, and all the other heresies were not held by those with education. This would be like those in the modern day that argue that abortion is ok because the fetus is not human. Well of course it's human! check it's genetic code! And, when a biologist speaks out in favor of maintaining legal abortion, they will never uses this argument. Ever. You can call it a parasite or cancer or whatever, but "human" is really really bad science. The common philosophical argument for maintaining legal abortion is that the fetus is "not a member of the moral society".
The Lord bless you and keep you; the Lord make his face to shine upon you and be gracious to you; the Lord lift up his countenance upon you and give you peace.