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In an Island the natives lie and visitors speak truth. A man wants to know whether a salesman beside him in a bar is a native or visitor. He asked him to ask a woman beside him whether she is a native or visitor. He replied "she says she is a visitor". Then he knew that the salesman is a native or visitor. salesman is in which category , native or visitor?

  
Total Answers and Comments: 7 Last Update: February 06, 2009     Asked by: Sivakumar 
  
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 Best Rated Answer
Submitted by: pdsubbu
 
the salesman says - "She says she is a visitor", which obviously means that he admits that she is a woman. So he is telling the truth. So the salesman is a visitor....

Above answer was rated as good by the following members:
bhanupratap56, amar.teja007, dhanyadmenon, omanohar, n4neeraj, radha madhuri, naveen chandru, priyanka31goyal, activesathish
June 26, 2007 14:45:04   #1  
avinash shetty        

RE: In an Island the natives lie and visitors speak tr...

The answer is he is a visitor i.e. he is telling the truth


Reason:

If he was a native i.e. a liar then his answer would would have been "she says
she is a native" for both cases because

If she was visitor: she would have said she is a visitor and he would have lied
that she is a native

If she was native: she would have lied and again say that she is a visitor and
he would have lied that she is a native.



Best of luck bye


 
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December 27, 2007 13:08:33   #2  
pdsubbu Member Since: December 2007   Contribution: 1    

RE: In an Island the natives lie and visitors speak truth. A man wants to know whether a salesman beside him in a bar is a native or visitor. He asked him to ask a woman beside him whether she is a native or visitor. He replied "she says she is a visitor"
the salesman says - "She says she is a visitor" which obviously means that he admits that she is a woman. So he is telling the truth. So the salesman is a visitor....
 
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February 25, 2008 08:16:54   #3  
sandy142 Member Since: February 2008   Contribution: 1    

RE: In an Island the natives lie and visitors speak truth. A man wants to know whether a salesman beside him in a bar is a native or visitor. He asked him to ask a woman beside him whether she is a native or visitor. He replied "she says she is a visitor"
What avinash shetty says is absolutely tremendous concept.
Yes he is a visitor.
We can look in another manner
reason:

Salesmen replied
She says she is a visitor . it means salesman does not know that women .
Its proves that he does not belong to that island and he is outsider.

 
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May 18, 2008 03:31:44   #4  
bhanupratap56 Member Since: May 2008   Contribution: 2    

RE: In an Island the natives lie and visitors speak truth. A man wants to know whether a salesman beside him in a bar is a native or visitor. He asked him to ask a woman beside him whether she is a native or visitor. He replied "she says she is a visitor"
What pdsubbu answered is simply brilliant..
No need of reasoning the question.
The salesman replies she says she is a visitor the man enquires about the woman and the salesman refers her as she which implies that sales man is saying truth and he is a visitor

 
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July 28, 2008 15:48:59   #5  
omanohar Member Since: July 2008   Contribution: 1    

RE: In an Island the natives lie and visitors speak truth. A man wants to know whether a salesman beside him in a bar is a native or visitor. He asked him to ask a woman beside him whether she is a native or visitor. He replied "she says she is a visitor"
Four case can happen:
1. woman visitor salesman visitor
In this case woman will say that i am vistor and salesman will say she is vistor'

2. woman native salesman native
In this case woman will say i am vistor and salesman will say she is native

3. woman vistor salesman native
In this case woman wil say i am visitor and salesman will say she is native .

4. woman native salesman visitor
Here woman says i m visitor sales man says she is visitor

from the above 4 cases only case 1 and case 4 holds good as here the salesman says she is visitor which is what the salesman says in the problem.

In both cases 1 and 4 salesman is a vistor so confirmed that salesman is a visitor.

 
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September 10, 2008 00:56:57   #6  
phanikasum Member Since: September 2008   Contribution: 1    

RE: In an Island the natives lie and visitors speak truth. A man wants to know whether a salesman beside him in a bar is a native or visitor. He asked him to ask a woman beside him whether she is a native or visitor. He replied "she says she is a visitor"
omanohar's solution is absolutely correct. Probably the below table would also help to understand the solution (table is just for explanation). Take all possible combinations into consideration and check it's validity.

Salesman

Woman

Validity

True

Told: She is a visitor

Actual (told by woman): She is a visitor

True

Told (taken from salesman’s actual): She is a visitor

Actual: She is a visitor

Valid

True

Told: She is a visitor

Actual (told by woman): She is a visitor

False

Told (taken from salesman’s actual): She is a visitor

Actual: She is a native

Valid

False

Told: She is a visitor

Actual (told by woman): She is a native

True

Told (taken from salesman’s actual): She is a native

Actual: She is a native

Invalid as native doesn’t speak truth

False

Told: She is a visitor

Actual (told by woman): She is a native

False

Told (taken from salesman’s actual): She is a native

Actual: She is a visitor

Invalid as visitor doesn’t lie


In both the valid cases salesman is saying truth. So he is a visitor.

Other answers which said that the salesman identified her as a woman is incorrect.
In these type of questions we have to identify the main part for which True/False has to be applied (in this case visitor-native). We can't just take any part (like she-he says-didn't say is-was etc).

Thanks.

 
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January 24, 2009 06:39:31   #7  
varunkakkar Member Since: January 2009   Contribution: 1    

RE: In an Island the natives lie and visitors speak truth. A man wants to know whether a salesman beside him in a bar is a native or visitor. He asked him to ask a woman beside him whether she is a native or visitor. He replied "she says she is a visitor"
We know that the answer of the question that man asked was that She is a visitor . Native will Lie and Visitors will speak truth. So we can assume that both Lady and Saleman could be visitor or Native. Basically there are 4 scenarios and the result after salesman has asked the question are:

Lady Visitor Visitor Native Native

Salesman Visitor Native Visitor Native
----------------------------------------
Result Visitor Native Visitor Native


So in both the cases where we are getting the answer as Visitor the Salesman is also a Visitor. He is a visitor..



 
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