you r visiting a strange country in which there are just two kinds of people - truthtellers and liars. Truthtellers always tell the truth and liars always lie. You hail the first two people you meet and say, "Are you truthtellers or liars?" The first person mumbles something you cant hear. The second says, "He says he is a truthteller. He is a truthteller and so am i." Can you trust the direction that these two may give you?
2006-10-18 18:28:18 · 5 answers · asked by Miss Question Mark 2 in Education & Reference ➔ Homework Help
I've had to rethink my answer to this several times. I found someone who can state it better and more clear than I can. I started thinking about the truthtellers and liars... everything a liar says is a lie; everything a truthteller says is true. If a truthteller says he lying, then he's no longer a truthteller. He's a liar. So a truthteller is bound to tell the truth. In this case, the only thing a truthteller can say is "I'm telling the truth." If a liar says "I always tell the truth" he is lying, but if he says "I always tell lies" then is he lying or telling the truth? Liars always tell lies, so for him to say he tells lies means he's telling the truth, which he cannot do.
"I am lying" cannot be said by a truthteller.
"I am lying" cannot be said by a liar
http://experts.about.com/q/Word-Problems-2062/Logic-1.htm
.This is, of course, similar to a scene in Labryinth in which Sarah figures out what question to ask the guards to get the right answer.
"Which door will the other guard tell me to take if I ask him which way is the way out?"
No matter what answer the guy gives you, take the other door.
If you ask the truth teller, he will tell you which door the liar will tell you to take. Since the liar will point you in the wrong direction, just take the other door.
If you ask the liar, he will know which door the truth telling guy will tell you to take, but since he's a liar, he'll point you in the wrong direction. So, just take the other door.
2006-10-18 18:57:24 · answer #1 · answered by imhalf_the_sourgirl_iused_tobe 5 · 1⤊ 0⤋
Truth Teller And Liar Riddle
2017-01-16 03:56:08 · answer #2 · answered by ? 4 · 0⤊ 0⤋
First, No.1 will answer He is a Truthteller (T) in any situation. You have to listen to #2's two statements.
Possible outcomes. It's supposed to be a table.
...............1st person...............2nd person
....................Truth............... Truth, possible
.....................Truth ..............Liar, this one won't happen because #2 would quote #1 as saying he's a liar. and he said #1 said T.
......................Liar.............. Truth, not possible, because if #2 is always T, then he would honestly quote #1, but then would say #1 is a liar.
.......................Liar.............. Liar, Not possible, Because #1 will say "I am Truthteller" whether he is one or not. # 2's First statement is a true statement. Otherwise #2 would have qouted #1 as saying "I lie". Since it is either all truths or all lies, per person, and #1's first statment is true, them Both men are truthtellers by the second statement.
You have to basically run every outcome and see how the statments would fit the situations.
G/L
2006-10-18 18:46:17 · answer #3 · answered by captn_carrot 5 · 4⤊ 0⤋
Trust the first one who just mumbled something because the true people don't have to prove that they are saying the truth. The second person actually says that he is a truth teller - which means that he is trying to convince you that he is a truth teller.
2006-10-18 18:43:49 · answer #4 · answered by Sanghrajka 2 · 0⤊ 1⤋
I like it. It's very funny..-
2016-05-22 01:18:52 · answer #5 · answered by Megan 4 · 0⤊ 0⤋