1 Corinthians 15:8
1 Corinthians 15:88And last of all He appeared to me also, as to one of untimely birth.
Watchtower commentary tends to read 15:8 as simply Paul closing the list of resurrection witnesses — a statement about timeline ("last of all") rather than about his credentials. JWs generally do not press the implication that Paul's apostolic authority stems from a post-resurrection appearance, because that raises awkward questions about the foundation on which the Governing Body claims its own teaching authority without having had any such appearance.
Paul is not merely closing a list — he is grounding his apostolic office. "Last of all he appeared to me" pairs with ("Am I not an apostle? Have I not seen Jesus our Lord?") and with Galatians 1 to establish that Paul's authority rests on a personal, public, resurrection-era appearance of the risen Christ. Use this at the door for the apostolic-deposit / paradosis argument: the apostolic deposit is closed because the apostles are closed. "If the Governing Body is a continuation of the apostolic channel, on which road to Damascus did its members meet the risen Lord? If the answer is 'none,' then the authority Paul grounds in 15:8 is not the authority they inherit."