So for instance the society taught prior to 1962 that if you took an organ tranplant you were in fact a cannibal and you asorbed the traits of the person who you got the organ from, and you were to be disfellowshipped...
Was that from the GB? Yes...are they directed/inspired by Holy Spirit? Yes...so Holy Spirit got that one wrong then as after 1962 they scrapped that idea.
The only way Holy Spirit is not wrong is if the Holy Sprit did NOT direct/inspire the GB to teach that teaching and therein lies the whole issue because that means you cannot trust the GB if what they produce may not be as a result of direction/inspiration from the Holy Spirit.