by **Flack** » Tue Jun 25, 2019 6:45 am

It took me years to understand the two-person version (which appeared in Labyrinth). That version goes like this: there are two people guarding doors; one is the one you want and the other leads to certain death. One of the guards always tells the truth and one always lies, but you don't know which is which. You can only ask one guard one question. The solution is to ask one guard which door the other guard would say is the good door, and then choose the opposite because it's guaranteed that one of them is lying. So if guard A says guard B would pick door #1, either guard A is lying (and guard B would have said door #2), or guard B is lying (and would have given you the wrong answer).

The one Tdarcos posted is infinitely more complex and has to do with asking questions that have multiple parts, like "if and only if A is true, what would you say about B" and so on. I get it, but I don't get it. I get that the complex questions eventually force the gods to give you answers that can eventually be dissected, but I don't get it to the point where I could solve it.

It took me years to understand the two-person version (which appeared in Labyrinth). That version goes like this: there are two people guarding doors; one is the one you want and the other leads to certain death. One of the guards always tells the truth and one always lies, but you don't know which is which. You can only ask one guard one question. The solution is to ask one guard which door the other guard would say is the good door, and then choose the opposite because it's guaranteed that one of them is lying. So if guard A says guard B would pick door #1, either guard A is lying (and guard B would have said door #2), or guard B is lying (and would have given you the wrong answer).

The one Tdarcos posted is infinitely more complex and has to do with asking questions that have multiple parts, like "if and only if A is true, what would you say about B" and so on. I get it, but I don't get it. I get that the complex questions eventually force the gods to give you answers that can eventually be dissected, but I don't get it to the point where I could solve it.