Man Asks Life-or-Death Question to Liars & Truth Tellers

  • Thread starter Thread starter colclipper
  • Start date Start date
Click For Summary

Discussion Overview

The discussion revolves around a logical puzzle involving a dying man, two women (one who always tells the truth and one who always lies), and two drinks—one that cures and one that poisons. Participants explore various questions the man could ask to determine which drink is safe.

Discussion Character

  • Exploratory
  • Debate/contested

Main Points Raised

  • One participant suggests asking woman #1 if woman #2 would say drink #1 would cure him, proposing a specific method to deduce the safe drink based on her answer.
  • Another participant proposes a different approach by suggesting that both women take a sip of their respective drinks, although this is challenged as it does not align with the requirement to ask a question.
  • A participant acknowledges the initial suggestion as a good answer, noting it as a variation of a similar logical problem involving a prisoner and an exit door.

Areas of Agreement / Disagreement

Participants express differing views on the appropriate method to solve the puzzle, with some agreeing on the question posed to woman #1 while others challenge the alternative suggestion of having both women sip their drinks. The discussion remains unresolved regarding the best approach.

Contextual Notes

Some participants highlight the importance of the constraints of the puzzle, specifically the requirement to ask a question rather than instructing the women to act.

colclipper
Messages
2
Reaction score
0
Here's a variation on the story I had not seen before. A man, who is dying, is in a bar. Two women are seated at a table. One always tells the truth and the other always lies. In front of the women are two glasses, one contains a drink that will cure the man, the other a poison that will kill him. What one question should he ask?
 
Physics news on Phys.org
Point to drink #1 and ask woman #1, "Would woman #2 say this drink would cure me?" If the answer is no, drink that one. If she says yes, drink the other one. Not much of a variation.
 
Tell both women to take a sip of their respective drink.
 
I heard the same 1 abut a prisoner and exit door.
Nice 1!
 
dav2008 said:
Tell both women to take a sip of their respective drink.
Yes, but you're supposed to ask one a question, not tell both of them to do something. Neither is obligated to do something, but each is obligated to always answer (since it says each always lies or always tells the truth).
 
daveb said:
Point to drink #1 and ask woman #1, "Would woman #2 say this drink would cure me?" If the answer is no, drink that one. If she says yes, drink the other one. Not much of a variation.

That'a the best answer I've seen. I had just never heard the problem phrased in this way.
 

Similar threads

  • · Replies 37 ·
2
Replies
37
Views
33K
  • · Replies 20 ·
Replies
20
Views
2K
Replies
2
Views
3K
  • · Replies 1 ·
Replies
1
Views
4K
  • · Replies 27 ·
Replies
27
Views
5K
  • · Replies 3 ·
Replies
3
Views
5K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 11 ·
Replies
11
Views
4K
  • · Replies 39 ·
2
Replies
39
Views
9K
  • · Replies 7 ·
Replies
7
Views
4K