"I cannot possibly comment on that."
This common episcopal utterance is particularly infuriating and it has been said to me on numerous occasions, not just by bishops but by archdeacons and rural deans as well. They gossip about you amongst themselves (correction: they exchange information about you amongst themselves) and come to conclusions, but when you attempt to put your side of the story to them they say, "I cannot possibly comment on that as I wasn't there." It really is a discussion killer. Which, I assume, is why they say it.