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- Feb 18th 2009, 04:10 AM #1

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## Islander problem

You are on an island with three tribes. One always tells the truth, one always lies, and one gives an answer randomly (like a flip of a coin, truth or lie)..

What are TWO (if possible) yes or no questions that you can direct to two different tribe members or to the same tribe member to determine which way to go..

- Feb 18th 2009, 07:19 AM #2

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- Feb 18th 2009, 07:50 AM #3

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- Feb 18th 2009, 07:59 AM #4

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- Feb 18th 2009, 08:16 AM #5

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- Feb 18th 2009, 08:52 AM #6

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- Mar 16th 2009, 06:28 AM #7

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- Mar 17th 2009, 01:35 AM #8

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## not there yet, but

we are talking about three tribes

Therefore you might ask:

if I ask x people from tribe a, y people from tribe, z people from tribe c ...

In this way using the fact of numbers to ask a repetuous question...

And, because of the fact that the half-half tribe would awnser the question 50% of the times truthfully (with a margin of error) this is also checkable for x, y, z large

As I said, not there yet...