To similarly outline the heresy:
If we claim (1) Mary is not the mother of God, then it is necessarily the case that (2) Jesus Christ is not God or (3) Mary is not the mother of Jesus Christ.
This, in either case, is obviously rank heresy.
To similarly outline the heresy:
If we claim (1) Mary is not the mother of God, then it is necessarily the case that (2) Jesus Christ is not God or (3) Mary is not the mother of Jesus Christ.
This, in either case, is obviously rank heresy.