Suppose a chess game was decisive but didn't go to checkmate. Why does its notation not say whether the loser resigned or lost on time?
There are plenty of NAG symbols; even some ($136-$139) relating to time pressure. Why not for "White/Black resigns" or "White/Black lost on time"?
If we don't know because the only information known is what's on the scoresheets, then that doesn't answer the question; it merely redirects its focus: Considering that this fact is needed so that people know, and can say, how the game ended, why hasn't FIDE made it a law that players should record this on their scoresheets?
I know that players are not obliged to record this. I'm asking why it has not been thought necessary to oblige players to do this.
I know that PGN has a
Termination tag, whose value is a string which someone might use to explain how come the game ended. But a game's score can be stated in a context which is not PGN. Even in a PGN file, the tags pertaining to a game are not part of its score (what PGN calls its "movetext"). Even among PGN tags,
Termination is optional.