Hussar
Legend
I think I'm getting my terms mixed up, because doesn't "Mother-May-I" refer to the need to have the GM approve of actions the characters can take, because the system in question doesn't codify abilities/moves they way many newer games do? I don't see how that overlaps with Map-and-Key, but I'm aware that this might be a forum-specific thing I'm not picking up on.
As for Map-and-Key and guesswork once inside the labyrinth or hexcrawl, I've always used a Rumours table and rumours with a small-r to disseminate the kind of information that allows for - at least - informed guessing on the part of the players. This is somethig I picked up from modules and stuff from the 80s onward, so I don't think it's a new or groundbreaking strategy!
Agreed. I think this may be where the breakdown is occurring.
People are inserting a “blind” in front of the guesswork that is neither intended nor implied. A semi-informed choice is still a guess.