Truth & Liar

Drewnogal

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General

16 Mar 13

ale1552

rural North Dakota

Joined: 31 Oct 07
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16 Mar 13

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I know the answer but I have forgotten it. 🙂 😛

Great Big Stees

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16 Mar 13

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That's true.

Drewnogal

Constant Gardener

The Plot

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Grampy Bobby

Boston Lad

USA

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16 Mar 13

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Do both Liars and Truth'ies walk on water?

Drewnogal

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johnnylongwoody

Dublin Ireland

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16 Mar 13

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-1

I'd say to the first cute little brunette that I met,

I'm going to have you............and that's the truth.

I wouldn't care which island I was on.

We'd be connected by a Long Woody.

Go on tell us the answer.

Drewnogal

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Kewpie

Felis Australis

Australia

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17 Mar 13

If you were to go home, would you cross the bridge?

If the answer is yes, you are on Liar Island.
If the answer is no, you are on Truth Island.

Sicilian Sausage

In your face

Joined: 21 Aug 04
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17 Mar 13

Originally posted by Kewpie
[b]If you were to go home, would you cross the bridge?

If the answer is yes, you are on Liar Island.
If the answer is no, you are on Truth Island.[/b]

Ahhhhhhhh.

Oooooooooo.

😛

Well done

Drewnogal

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Grampy Bobby

Boston Lad

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17 Mar 13

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"You are placed upon one of the islands and your task is to find out which island you are on; Truth or Liar Island. You are only allowed to ask one person one question to establish which island you are on." (OP)
____________________________________

Ask one person on either island, "Is this the Liar Island". The Liar will answer, "No" and the Truth Teller will answer, "Yes". Therefore, you are on Liar's Island. The Reverse Approach produces the same discovery: Ask one person on either island, "Is this the Truth Tellers Island" and the Liar will answer, "Yes". The Truth Teller will answer, "No". Therefore, you are on Still on Liar's Island. So, with one question you have established that you are on Liar's Island! (I think)

Note: Sorry for being a few minutes late. Great Puzzle. Thanks
.

JS357

Joined: 29 Dec 08
Moves: 6788

17 Mar 13

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Numerous internet variations exist and it's been covered on the posers and puzzles forum. But your brother may have another correct way.

Grampy Bobby

Boston Lad

USA

Joined: 14 Jul 07
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17 Mar 13

Originally posted by JS357
Numerous internet variations exist and it's been covered on the posers and puzzles forum. But your brother may have another correct way.

^
?

Kewpie

Felis Australis

Australia

Joined: 20 Jan 09
Moves: 389848

17 Mar 13

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Originally posted by Grampy Bobby

Ask one person on either island, "Is this the Liar Island". The Liar will answer, "No" and the Truth Teller will answer, "Yes". Therefore, you are on Liar's Island. The Reverse Approach produces the same discovery: Ask one person on either island, "Is this the Truth Tellers Island" and the Liar will answer, "Yes". The Truth Teller will answer, "No". T d! (I think)

Note: Sorry for being a few minutes late. Great Puzzle. Thanks
.

On this unidentified island, a person answers yes to your question. He may be a truthteller, in which case this is the Truth Island, but he may be a liar, in which case this is the Liar Island. You haven't established which island you're on. Same goes if the person answered no. Since you don't know if your respondent is a liar or a truthteller you've actually learned nothing.

Drewnogal

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