What would have been the proper course for the parent of a child
In every case, to save the life of one’s child —except taking the life of another human to save one’s child would be a horrible predicament. In the US a child is the ward of the State and he is getting blood if that is the only way or in the child’s best interest so a parent doesn’t have to worry about it —which Marvin Shilmer argued is disingenuous.
this is still a human interpretation subject to error,
What blood fractions are not blood is subject to error as you have shown. But you have not shown that BT teaching is.