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Way to Heaven

by dipinsingh
Tags: gaurd for heaven
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dipinsingh
#1
Aug27-08, 08:29 PM
P: 35
You found a guard right between Heaven and Hell ( you don't know which is which). He is from one of them and you don't know which of them he is from. If he is from Hell, he always lies and if he is from Heaven, he always speaks truth.
You got to find out heaven asking him only one question.

What would be your question?
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humanino
#2
Aug27-08, 08:43 PM
humanino's Avatar
P: 2,828
I'm not completely sure, I would try
Spoiler

"Is the door leading to the place you come from on the left ?"
  • If he comes from Heaven
    • if Heaven is on the left, he will say yes
    • if Heaven is on the right, he will say no
  • If he comes from Hell
    • if Heaven is on the left, he will say yes
    • if Heaven is on the right, he will say no
So independently of whether he comes from Heaven or Hell, Heaven is on the right if and only if he says "yes".
dipinsingh
#3
Aug27-08, 09:39 PM
P: 35
Quote Quote by humanino View Post
I'm not completely sure, I would try
Spoiler

"Is the door leading to the place you come from on the left ?"
  • If he comes from Heaven
    • if Heaven is on the left, he will say yes
    • if Heaven is on the right, he will say no
  • If he comes from Hell
    • if Heaven is on the left, he will say yes
    • if Heaven is on the right, he will say no
So independently of whether he comes from Heaven or Hell, Heaven is on the right if and only if he says "yes".
Your answer is correct.
just ask him .... which door u belong to....?

LogicNoob
#4
Nov8-08, 03:06 PM
P: 1
Way to Heaven

Quote Quote by humanino View Post
Spoiler

So independently of whether he comes from Heaven or Hell, Heaven is on the right if and only if he says "yes".
Shouldn't this mean that heaven is on the left only if he says "yes"?
The riddler
#5
Mar24-09, 12:47 PM
P: 94
I'D ask him can you say no. If he says no, he must be from hell.
llauren84
#6
May1-09, 09:14 PM
P: 44
Quote Quote by LogicNoob View Post
Shouldn't this mean that heaven is on the left only if he says "yes"?
You're right.
junglebeast
#7
May1-09, 10:51 PM
P: 462
Quote Quote by humanino View Post
I'm not completely sure, I would try
Spoiler

"Is the door leading to the place you come from on the left ?"
  • If he comes from Heaven
    • if Heaven is on the left, he will say yes
    • if Heaven is on the right, he will say no
  • If he comes from Hell
    • if Heaven is on the left, he will say yes
    • if Heaven is on the right, he will say no
So independently of whether he comes from Heaven or Hell, Heaven is on the right if and only if he says "yes".
I wonder if there is a way to generalize this logic to get truthful answers out of someone you are questioning (in real life) regardless of whether they are being honest or dishonest with you

Unfortunately I am terrible with these kinds of riddles, so I'm not sure...
Russell Berty
#8
May2-09, 04:31 AM
P: 105
Why don't you try the harder version?

http://www.physicsforums.com/showthread.php?t=310984
peeyush_ali
#9
May24-09, 09:36 AM
P: 87
Ask him whether he is a male or a female ..if he says female ..then you can confirm that he is from the hell and u may know the which is whcih ....if he's from heaven he would say "im a male" and subsequently u would know which is which... ;)
peeyush_ali
#10
May24-09, 09:38 AM
P: 87
oh sorry..the condition you have given is to ask "one question"..i didnt noticed it
turbo
#11
May24-09, 10:49 AM
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turbo's Avatar
P: 7,363
Just ask "would someone from your place say that this is the direction to heaven?"
thrill3rnit3
#12
Jun21-09, 01:08 AM
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thrill3rnit3's Avatar
P: 712
Ask him "Where are you from"

If he's from Heaven, he's going to tell you the truth - points to Heaven
If he's from Hell, he's going to lie - points to Heaven

:)


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