94 replies to this topic

[staggy]

Lets say there are three people A, B and C.

Q1: Ask B: If i ask A if he is a toggler (S) will he say yes?
Three possibilities: (i) No answer (ii) No (iii) Yes.

(i) No answer
You get no answer for the following combinations: A is S, B is L; A is S, B is T.
As you see is the above combinations A is always S.

Q2: AskB: Is A a toggler?
Two possibilities: Yes or No
Since we already know A is S, if the answer is Yes then B is T and C is L. END
If the answer is No then B is L, C is T and A is S. END

For this option we find out who is who with only two questions. Lets see the other options to the first question:

(ii) No
You get No for the following combinations: A is T, B is S (1); A is L, B is S (0) /* S (1) and S (0) implies that the toggler told the truth or a lie respectively for the first question.

Q2: Ask A: Is B a toggler?
Two possibilities: Yes or No. If yes, A is T, B is S, C is L. END
If No, A is L, B is S, C is T. END

We also find out who is who in this case in two questions. The last option of the first question will need three questions shown below.


(iii) Yes
We get yes for the following combinations: A is T, B is S (0); A is L, B is S (1); A is T, B is L; A is L, B is T.
Q2: Ask B: Is A a liar?
Two possibilities: (a)Yes or (b)No
(a)Yes
the combination are: A is T, B is L; A is L, B is T.
Q3: Ask B: If I ask A if u r a liar would he say yes?
Yes: A is L, B is T and C is S. END
No: A is T, B is L, C is S. END

(b) NO
Combinations are: A is T, B is S; A is L, B is S.
Q3: Ask A: is B a toggler?
Yes: A is T, B is S, C is L. END
No: A is L, B is S, C is T. END

[Multee-Pass]

NICE

Edited by Multee-Pass, 08 April 2008 - 11:14 PM.

[Corpuscallosum]

Ask one man if he is a man. If he says yes, he is either the random or the truthteller. If he says no, he is the liar.

Ask a second man if he is a man. If he says yes, he is either the random or the truthteller. If he says no, he is the liar.

If one of the first two answers you get is no, then that man is the liar, and ask him which of the other two men is the truthteller. Whichever man he chooses is the random, and the last man is the truth teller.

If the first two answers you get are Yes, then ask the third man, who must be the liar, which if the first two men is the truthteller. Whichever man he chooses is the random, and the last man is the truth teller.

[Scraff]

If one of the first two answers you get is no, then that man is the liar.

Not necessarily. He may be the random answerer.

[kcb]

This is how I worked it out.

People:
A B C

To person B: Are you a liar?

If answer = Yes
B = Random Answerer
Go to person C and ask "Is person B the random answerer"
If answer = Yes
C = Truth Teller
If answer = No
C = Liar

If Answer = No
B = Random Answerer or Truth Teller
Go to person C and ask "Are you a liar?"
If answer = Yes
C = Random Answerer
B= Truth Teller
A = Liar

If answer = No
A = Liar
Ask person C "Are you the truth teller?"
If answer = No
C = Random Answerer
B = Truth Teller

[scuttill]

All I have to say is that if I am ever stranded on an island with but only one way to sure escape, caught behind two locked doors with one leading to certain death, being boiled alive in lava with one shot to ask a question to get me out, ... I want Writersbloc in my party ... Well done, indeed, as I was about to give up and decided to scan for other responses.

[Gaunt]

What about this?

Spoiler for My Solution

Ask person 1: If I ask person 2 if he is the Liar, will he say no?
Ask person 2: If I ask person 3 if he is the Liar, will he say no?
Ask person 3: If I ask person 1 if he is the Liar, will he say no?

One of the men will not answer, because he can't honestly (or dishonestly) predict what the random man would say.
Let's call the man who refused to answer B. The man we asked him about is C, and the other man is A.
B's lack of response identifies C as the random answerer. C's response is random and therefore worthless.

We know that if we actually asked B man if he was the liar, he would deny either way.
Therefore:
If A says no: he tells the truth, and B lies.
If he says yes, he is the liar, and B tells the truth.

[Asdfgh Zxcvbn]

Hello Ppl. Whats up. I hope im not copying anyone with this answer, and if i am im terribly sorry. Now here's my answer

Spoiler for truth,lies,random

L=liar T=truthteller B=both(random answers person)

Ok. Now, this depends on if the sun is out or not.

If the sun is out, you ask the question "is the sun outside"

Now, the L will say no, the T will say yes, and the B will say yes or no

if B says yes, then you ask the L (the only one that lied) who the T is

He'll tell you the B (because he lies)

With this you can tell that the person that the L said the T was is the B, and so the person that the L didnt talk about it the real T

Now, if the B says a lie, then you should ask the T (the only person that said the truth), who the L is, now, the person the T says is the L, really is the liar.

Also, if the sun isnt out you ask the question (is the sun away.

BTW- "the sun is out" means that you can see the sun; it is not dark outside

"is the sun away" means that it is dark outside

Just in case i wasn't clear

[Asdfgh Zxcvbn]

Sorry if i didnt mention this, because i know people will try to say "what if you are in a room and there is no way to tell where the sun is right now"

Well, the question i gave was an example of a good question.

A type of question you need to ask is something you know the answer to, and so do the 3 ppl (T,L,B)

you could ask the colour of something or ask where you 4 ppl are in the world

as long as it is something that all 4 of u ppl know the answer to

[Martini]

What about this?

Spoiler for My Solution

Ask person 1: If I ask person 2 if he is the Liar, will he say no?
Ask person 2: If I ask person 3 if he is the Liar, will he say no?
Ask person 3: If I ask person 1 if he is the Liar, will he say no?

One of the men will not answer, because he can't honestly (or dishonestly) predict what the random man would say.
Let's call the man who refused to answer B. The man we asked him about is C, and the other man is A.
B's lack of response identifies C as the random answerer. C's response is random and therefore worthless.

We know that if we actually asked B man if he was the liar, he would deny either way.
Therefore:
If A says no: he tells the truth, and B lies.
If he says yes, he is the liar, and B tells the truth.

There are actually two men who can't answer, not one, so the solution the way you proposed it won't work. Also, it assumes that not answering is permissable, so the random answerer can also choose not to.

Hello Ppl. Whats up. I hope im not copying anyone with this answer, and if i am im terribly sorry. Now here's my answer

Spoiler for truth,lies,random

L=liar T=truthteller B=both(random answers person)

Ok. Now, this depends on if the sun is out or not.

If the sun is out, you ask the question "is the sun outside"

Now, the L will say no, the T will say yes, and the B will say yes or no

if B says yes, then you ask the L (the only one that lied) who the T is

He'll tell you the B (because he lies)

With this you can tell that the person that the L said the T was is the B, and so the person that the L didnt talk about it the real T

Now, if the B says a lie, then you should ask the T (the only person that said the truth), who the L is, now, the person the T says is the L, really is the liar.

Also, if the sun isnt out you ask the question (is the sun away.

BTW- "the sun is out" means that you can see the sun; it is not dark outside

"is the sun away" means that it is dark outside

Just in case i wasn't clear

"if B says yes, then you ask the L (the only one that lied) who the T is"

What if two of them lied?