https://www.jehovahs-witness.com/topic/5741772070191104/godteachings-mens-personal-opinions-interpretations
THE WATCHTOWER, Study edition February 2017
page 26 par. 12 ( Study article for Sunday April 30th 2017)
Q. 2. Since the Governing Body is neither inspired nor infallible, what questions arise?
“WHO REALLY IS THE FAITHFUL AND DISCREET SLAVE?”
12 The Governing Body is neither inspired nor infallible. Therefore, it can err in doctrinal matters or in organizational direction. In fact, theWatch Tower Publications Index includes the heading “Beliefs Clarified,” which lists adjustments in our Scriptural understanding since 1870.
Of course, Jesus did not tell us that his faithful slave would produce perfect spiritual food. So how can we answer Jesus’ question: “Who really is the faithful and discreet slave?” (Matt. 24:45)