2 doors - 1 to heaven and 1 to hell) but still, it's one of the best brain teasers.
There are a few types of logic questions: There are two kinds of people on a mysterious island.
And that means that C was right saying B is lying - so C is an honestant. So if A was a swindlecant, then his statement would be false (thus A would have to be an honestant and B would have to be a swindlecant).
However, that would cause a conflict which implicates that A must be an honestant.
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In that case at least one part of his statement is true and as it can't be the first one, B must be an honestant, too.
Our gringo displeased the sovereign with his intrusive questions and was condemned to death.
" B answers: "A said that he is a Swindlecant." And to that says the fellow C: "Do not believe B, he is lying! It is impossible that any inhabitant of such an island says: "I am a liar." An honestant would thus be lying and a swindlecant would be speaking truth.
So B must have been lying and therefore he is a swindlecant. Such a disjunction is false if both P and Q are false. Note that in everyday language, use of the word "or" can sometimes mean "either, but not both" (e.g., "would you like tea or coffee? In logic, this is called an "exclusive disjunction" or "exclusive or" (xor).