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Clarification of Knights and Knaves (#29890)

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Added a couple of clarifying points to the knights and knaves example. Also gave the wikipedia link a more descriptive title.
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joesvetz
2019-05-16 23:01:28 -07:00
committed by Parth Parth
parent 1beaac868e
commit cc0eaff745
1 changed files with 3 additions and 5 deletions
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guide/english/logic/knights-and-knaves/index.md
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@ -16,14 +16,12 @@ Two people, Red and Blue, stand before you. Red says, “We are both knaves.”
### Which Path to Take?
You come to a fork in a road and need to learn which path leads to your destination. Two individuals are standing there. You know that one is a knight and one is a knave, but you don’t know which is which. What single yes-or-no question could you ask of one of the islanders to learn the correct path?
You come to a fork in a road and need to learn which path leads to your destination. Two individuals are standing there. You know that one is a knight and one is a knave and they both know the correct path, but you don’t know which is which. What single yes-or-no question could you ask of one of the islanders to learn the correct path?
**Solution:** Point to a path and ask of one, “Would the other one tell me that this is the correct path?” If the answer is No, that is the correct path; if Yes, it is the incorrect path.
**Solution:** Point to a path and ask of one, “Would the other one tell me that this is the correct path?” If the answer is No, that is the correct path; if Yes, it is the incorrect path. This is because the knight would accurately tell you that the knave would be lying, while the knave, knowing the knight would tell the truth, would have to say what was incorrect. In both cases, a "No" would mean the path is correct, and vice versa.
<!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds -->
#### More Information:
* <a href='https://www.amazon.com/gp/product/0486481980/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0486481980&linkCode=as2&tag=brenconl05-20&linkId=UU6GFKPWEKZFK2XG' target='_blank' rel='nofollow'>What is the Name of This Book? from Amazon</a>
* <a href='https://en.wikipedia.org/wiki/Knights_and_Knaves' target='_blank' rel='nofollow'>Wikipedia Article</a>
* <a href='https://en.wikipedia.org/wiki/Knights_and_Knaves' target='_blank' rel='nofollow'>Knights and Knaves Wikipedia Article</a>