Today’s line The contrarian read
“Now, my friend, you have a choice: Admit defeat, or I will be forced to dislocate your shoulder. Either way makes no difference to me. Now choose.”
The courtesy is the tell. Griffith calls a man he has never spoken to at length "my friend" twice in one duel, and the offer of a choice is made at the moment the choice has stopped existing. Guts picks the shoulder, Griffith takes it, and the next thing he says, holding Guts' face in both hands while the band cheers, is that Guts now belongs to him.