Knights and Knaves 2

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A classic type of puzzle due to Raymond Smullyan
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Bob is a Knave.

If Alice is a Knight and is telling the truth, then Bob can only be a Knave.

If Alice is a Knave, then, as she is a knave and they cannot both be a knight (as she is a knave), then they are both knaves.

Either way, Bob is a Knave.

Para
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If Alice were a knave, then Bob would also be a knave (0 knights), and if Alice were a knight, bob would also be a knave, because she would be the one knight, so bob is always a knave

Isaac-zydo
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Bob could be a knight. All we know is that Alice THINKS he's a knave.

Nuclearburrit
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Bob is a Knave. Alice can be both Knight or Knave (insufficient info about Alice).

professorpoke
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3 persons you, Alice & Bob , So there have to be atleast 2 off the same kind to her but she doesnt know you, so she tells not the truth but is kinda guessing therefore a knave

bob is the Knight

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