this post was submitted on 23 Sep 2023
82 points (97.7% liked)
Asklemmy
43965 readers
1741 users here now
A loosely moderated place to ask open-ended questions
Search asklemmy ๐
If your post meets the following criteria, it's welcome here!
- Open-ended question
- Not offensive: at this point, we do not have the bandwidth to moderate overtly political discussions. Assume best intent and be excellent to each other.
- Not regarding using or support for Lemmy: context, see the list of support communities and tools for finding communities below
- Not ad nauseam inducing: please make sure it is a question that would be new to most members
- An actual topic of discussion
Looking for support?
Looking for a community?
- Lemmyverse: community search
- sub.rehab: maps old subreddits to fediverse options, marks official as such
- [email protected]: a community for finding communities
~Icon~ ~by~ ~@Double_[email protected]~
founded 5 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
You are in a room with two doors. Each door has one guard. One door leads to heaven and the other leads to hell. You have to choose one door and once you choose it, you have to go there. Before you choose, you can ask one of the guards one question. One of them always lie and the other always tell the truth. You don't know which guard is the liar/truth teller and you don't know which door leads to hell/heaven. What's the question you ask the guard?
Dammit, I was actually rethinking about this one a few days ago. The Video that made me rethink about it
If I'm not wrong the answer is something a bit twisted lie "If I where to ask you if you are guarding the right door, would you say you are?" Which because it's a double lie, there is a way where they cross each other
Also xkcd post about this riddle
You answer is right. I heard the solution as follows: Would the other guard say that you are guarding the right door? And then you revert it. Yours solution is better. The XKCD and the video made me laugh, thanks.
Here is an alternative Piped link(s):
The Video that made me rethink about it
Piped is a privacy-respecting open-source alternative frontend to YouTube.
I'm open-source, check me out at GitHub.
What's 2+2?
The guard replies either four or something else. You now know which of the guards is the liar and who is the truth teller. You used your one question and still have no clue which door leads to hell and which leads to heaven. You have to guess ๐.
That will deduce the liar and truth-teller, but won't give you any information about which door leads where.