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A game played with the traditional board game "guess who" but with slightly different rules. The difference is that a given question can only be asked once over a period of multiple games (usually for the whole weekend, or however long you're trapped in the cabin with nothing to do except play guess who, but possibly forever!).

If someone asks a repeat question, they lose.

Since the number of objective, declarative questions is rather finite, the later stages of No-Repeat Guess Who are similar to subjective guess who.

Questions are identified by their meaning - you can't change the word order, or add a trivial extra phrase, to ask what is essentially the same question twice.
Sample question from No-Repeat Guess Who: "Is your person a member of The Allman Brothers?"
by firebus July 21, 2010