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Making a fair choice


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19 replies to this topic

#1 DeGe

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Posted 19 August 2013 - 10:16 AM

3 friends (A, B, C) want to decide on which restaurant to go to on the weekend. They all have a different preference (Restaurant 1,2, 3).

The only communication between them before the weekend (meeting at the restaurant decided) is through e-mails.

How can they together decide which restaurant to go to in a fair process which involves all 3 of them in the decision making?

 

 


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#2 Anza Power

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Posted 19 August 2013 - 09:05 PM

There are many ways, not sure which one you are looking for.

Spoiler for one option

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#3 OmegaScales

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Posted 19 August 2013 - 09:21 PM

Would it count if

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When the fiery moon rises and the frozen sun sets, then the war between good and evil shall come to an end. Until then I, the guardian of both heaven and hell, the keeper of destruction and bringer of peace, shall dream these lives to death and freedom.


#4 dgreening

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Posted 20 August 2013 - 12:54 AM

Spoiler for

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#5 phaze

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Posted 20 August 2013 - 04:42 AM

I think the point is if all 3 are deceitful it gets a little trickier,  If person 1 receives an email from person 2  stating that they prefer restaurant A but they do not like this choice they could email person 3 and say "person 1 and myself both want to go to restaurant B"


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#6 DeGe

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Posted 20 August 2013 - 08:41 AM

they agreed to have one of them ask a fourth, random person to choose for them, then tell the others the choice made?

The fourth person could be influenced by any of the three!

 

phaze has a valid point regarding answers from Anza and dgreening.


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#7 OmegaScales

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Posted 20 August 2013 - 02:44 PM

The fourth person could be influenced by any of the three!

How can a random person, whom none of them has ever met, be influenced on such a mundane choice? And don't say money, because it would make no sense to pay someone for such a simple thing.


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When the fiery moon rises and the frozen sun sets, then the war between good and evil shall come to an end. Until then I, the guardian of both heaven and hell, the keeper of destruction and bringer of peace, shall dream these lives to death and freedom.


#8 phil1882

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Posted 20 August 2013 - 08:06 PM

they can agree to random chance it.

roll a dice. 1 or 4 equals restaurant 1, 2 or 5; 2; 3 or 6, 3


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#9 harey

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Posted 20 August 2013 - 08:32 PM

Spoiler for In absence of precise rules for the decision,


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#10 Anza Power

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Posted 20 August 2013 - 09:08 PM

Aha, ok then here's another idea:

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