It is possible that losing will become unavoidable for some players, that is, they may not have the opportunity to make more points than the other players. Thus, a player may be left with choosing between: 1) losing while opponent A wins, or 2) losing while opponent B wins, or 3) maybe somehow negotiating their way into a draw with the leverage that they have.
You can find the full rules in the first post of this thread: Diplomatic Go
See item 7 under “General Order of Play”
Yes, he mentions this in his Kibitz log above.