I'm sorry, I hope I'm correct in assuming that you don't handle all cockpit disagreements in that way - but your approach as you described it seems a tad antiquated, no offense. Obviously if an F/O doesn't agree with reason as you described the captain should make his point clear - after all he's PIC. But - that doesn't mean that the FO is always wrong in having a different opinion than the captain... In any case, whats left to discuss here? Yes, someone scraped a 777 tail, doesn't matter who did it, some other bloke managed to take out dozens of approach lights in an A345. Mishaps happen, there are well known ways of preventing it.