Much evidence has been provided to demonstrate that the WTS is a false prophet even though JWs will say anything to deny this unpleasant fact. Generally they act and teach explicitly that the GB speaks for God - that it is is God's sole channel of communication - but also claim that the GB is not inspired. That is a distinction without a difference.
This has caused You Know to be on the lookout for JW teachings "channeled" to him by the Slave but which are without a Bible basis. There are a number of them but he refuses to see them when they are supplied. YoYoMama calls everything trivial - in retrospect - but even the smallest current JW teaching is a big deal for JWs, that is, until it is deemed trivial at some future date. Normie67 claimed that the 7000 year long Creative Day was referred to only once in the WTS's literature. Etc Etc.
It is hard, it seems, to find an honest man or woman among the lot of 'em.
So here's another chance for the JWs to demonstrate how honest they are.
Here goes :-
From where does the GB get the authority to tell JWs which blood parts they can accept and which they cannot? How do they know so surely, e.g., that intact red cells are off-limits but hemoglobin extracts - essentially red cells without the cell walls - are ok.
So, can any JW explain how the GB is able to decide these life and death matters if (a) such things cannot be found in scripture and (b) the GB is only inspired in the sense that the Bible was inspired and so they base their beliefs only on the Bible?