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brain teaser

maybe I'm missing something HappyScrappy....but wtf are you talking about?.....you're thinking too hard....


Follow me....YOU ask Comp A: what will Comp B say the safe button is?
Comp A answer: B

Now....Lets say YOU asked Comp B: What will Comp A say the safe button is?
Comp B answer: B


PICK THE OPPOSITE...IT DOESN'T MATTER WHICH ONE YOU ASK....YOU DON'T HAVE TO KNOW WHICH COMP IS TELLING THE TRUTH OR LYING..IT'S IRRELEVANT..ALL YOU HAVE TO KNOW IS THAT ONE COMP DOES LIE AND THE OTHER DOES TELL THE TRUTH THOSE ARE THE ONLY 2 VARIABLES YOU NEED TO KNOW, IT DOESN'T MATTER WHICH ONE...PICK THE OPPOSITE....:D
 
steel beast

---<snip>
you ask one of the computers what the other computer will tell you to push, to open the door....and choose the opposite.
---</snip>

so this presents two scenarios

1) The computer you're asking is the computer that lies. That computer will reverse the information provided by the other computer, making it the false statement. Therefore you choose opposite the answer.


2) The computer you're asking is the computer that tells the truth. That computer will correctly inform you with the wrong answer that the lying computer provided. Therefore you choose the opposite button.

This is the correct answer to ask.
 
constants:

Button Red is correct
Computer A lies

Question:

"Computer A, what would Computer B tell me to push?"

Computer B would reply Red - because that is correct (constant). Since Computer A lies (constant), it would reply to you to press the green button. So you do the opposite.

--or--

constants:

Button Green is correct
Computer A tells the truth

"Computer A, what would Computer B tell me to push?"

Computer B would reply Red - because Computer B lies (constant). Computer A would tell you to push Red as well, because it is answering the question truthfully (constant). So you do the opposite.

No real need to get into logic operations involving numbers. It's just a simple problem.
 
you didn't do the opposite, as in Mr?'s answer to the teaser.

And there's nothing about getting a response from only one computer - it's that you can only directly ask one computer a question. There's nothing about asking one computer to ask the other.

The whole point is this:

You ask one computer what the other would say.

Either the computer you're asking directly is going to lie, or when the computer you ask directly asks the other computer - that one will lie. So, you always do the opposite.
 
thefantom1 said:
A similar brain teaser... you are lost in the woods that is inhabited by 2 tribes..One tribe is friendly and will always tells the truth...the other tribe are cannibals and will always lie..you run into a tribesman (unknown which tribe) and get to ask him one question..what question do you ask??

You ask him which way to his tribe....
 
Steel Beast,

I was confused just as you are now. I went through a complicated thought process and always came up empty.

Its hard to believe the answer due to its simplicity.

All the needed info was given properly and the answer is correct.
 
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