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6 replies to this topic

#1 minimeisacutie

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Posted 24 February 2008 - 01:05 AM

The population of the world in 2999 has been dominated by aliens. the only humans left are humans dressed as aliens. Aliens cannot lie and humans can not tell the truth. Give these factors who is whom in this situation?

A) Identifies himself to B
B) he tells C "he says he is an alien."
C) he answers B, "no he is not an alien he is a human being"

Spoiler for answer to problem

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#2 bonanova

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Posted 24 February 2008 - 06:45 AM

The population of the world in 2999 has been dominated by aliens. the only humans left are humans dressed as aliens. Aliens cannot lie and humans can not tell the truth. Give these factors who is whom in this situation?

A) Identifies himself to B
B) he tells C "he says he is an alien."
C) he answers B, "no he is not an alien he is a human being"

Spoiler for answer to problem

Being human, I suppose I should give an incorrect answer so as not to tell the truth.
Since it's not 2999 yet, I'll stick with trying to do it right.
Congratulations for an excellent twist an old puzzle....!
Spoiler for We know who all three are ...

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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

#3 storm

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Posted 24 February 2008 - 09:58 AM

Spoiler for My guess

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#4 storm

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Posted 24 February 2008 - 10:01 AM

Being human, I suppose I should give an incorrect answer so as not to tell the truth.
Since it's not 2999 yet, I'll stick with trying to do it right.
Congratulations for an excellent twist an old puzzle....!

Spoiler for We know who all three are ...


Bona, C is not contradicting B becoz B is stating the claim of A not the actual state, But C is talking about the fact. So, the second answer is also correct.
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#5 storm

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Posted 24 February 2008 - 10:04 AM

Lets make another twist---now, only one answer is possible--

A) Identifies himself to B
B) he tells C "he says he is an alien."
C) he answers B, "no he is not an alien he is a human being"
D) he says both of you (B and C) are lying.
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#6 bonanova

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Posted 25 February 2008 - 08:30 PM

Bona, C is not contradicting B becoz B is stating the claim of A not the actual state, But C is talking about the fact. So, the second answer is also correct.

C's answer is: "no he is not an alien he is a human being".

My sense is that "no" only makes grammatical or logical sense if taken to be an independent statement that requires B's statement as a context.
Doing so makes A an alien.
Spoiler for Here's why I think that...

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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

#7 bonanova

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Posted 25 February 2008 - 08:44 PM

Lets make another twist---now, only one answer is possible--

A) Identifies himself to B
B) he tells C "he says he is an alien."
C) he answers B, "no he is not an alien he is a human being"
D) he says both of you (B and C) are lying.

Spoiler for My answer

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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell




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