i was thinking more on the lines of Knights and knaves - the logic puzzles where some always lie and some always tell the truth.
Obviously Knights and Knaves are the wrong number of letters
https://en.wikipedia.org/wiki/Knights_and_Knaves
...but I found this in the above file
Maurice Kraitchik presents the same puzzle in the 1953 book Mathematical Recreations, where two groups on a remote island – the Arbus and the Bosnins – either lie or tell the truth, and respond to the same question as above
Arbu and Bosnin = 4,3,6
..But is it too obscure.....you decide