The problem of other minds

The problem of other minds is the question of how you can justify believing that anyone else has a mind, when you only ever have direct access to your own experience.

The Lobby dial: a single player, everyone, or players and non-player characters you can’t tell apart from the inside.

The Lobby dial is this problem turned into a setting. You can have a single player, everyone as a real player, or real players mixed with non-player characters. From the inside, you can’t tell which.