When the "apostasy" presented itself in 1981 at Bethel, with private pre-study groups for meetings, the WTS had to change its "opinion" of what Acts 17:11 said, a 180 turn. Never again did they say it this way again.
*** w81 2/15 p. 18 Do We Need Help to Understand the Bible? ***How shall we view the spiritual food provided by this “faithful and discreet slave”? Should it be viewed critically—‘Oh, well, it might be true but then again it might not be and so we have to scrutinize it very critically’? Some apparently have felt that way about it. To support their way of thinking they have quoted Acts 17:11, which says of newly interested persons at Beroea: “Now the latter were more noble-minded than those in Thessalonica, for they received the word with the greatest eagerness of mind, carefully examining the Scriptures daily as to whether these things were so.” But does this mean that those Beroeans were looking for flaws in the message they were hearing, or that their attitude was one of doubting? Does this set a precedent for regarding critically the publications brought forth by the “faithful and discreet slave,” with a view to finding fault? Not at all!