Earlier quoted context omitted.
> You know how a chess player will say something like "mate in 6" because their experience of all the options left to their opponent are both easily countered and will not prevent them from losing? As a chess person, saying "Mate in _" means it's a calculated inevitability. There is no mathematical way out of it. It is not nearly equivalent to the outside judgement of a company with so many factors — it's just incomp…
Yes, but there are other positions that do fit the comparison, like a couple of advanced passed pawns that can still be defended against with surgical precision, but most times are lethal.
In chess, it's specifically used for saying "even with the best defense possible, you will be mated no mater what in a maximum of X moves." Computers use this definition as well. If Stockfish says # in 6, that means there is an indefensible path to mate available, and with the best play of the opponent will take 6 moves.
It's not a "Mate in X, probably."