Do you think chess and mathematics are related?
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May 27, 2013
0
#304
One can only wonder whether the answer has been lost forever, because of this deletion. We may never know!
tigbench wrote:
[COMMENT DELETED]
Translation: I have discovered a truly marvelous proof of this, which however the margin is not large enough to contain
lol
If you are a genius people, give your reasonable answer for this test. "When Cheryl's birthday is? Explain your answer with logic argument, please!
You've been here 7 days and you've bumped 3 threads that are 5 yrs old. Why? Show your answer on a separate paper.
DrSpudnik wrote:
They also are third cousins, because one of their grandmother's nephews married his grandfather's niece.
Angsa-Putih wrote:
If you are a genius people, give your reasonable answer for this test. "When Cheryl's birthday is? Explain your answer with logic argument, please!
Albert's first reply shows that the birthday is not May or June (if it were either of these, then the birthday might have been identifiable from the day alone, so he could not be sure that Bernard did not know it).
Bernard's reply shows that the day is not the 14th, or he would not have enough information.
Albert's further reply shows that the month is July, or he would not have enough information (if the month were August then he still could not know if it were the 15th or 17th).
Therefore the birthday is July 16th.
Gil-Gandel wrote:
Angsa-Putih wrote:
If you are a genius people, give your reasonable answer for this test. "When Cheryl's birthday is? Explain your answer with logic argument, please!
Albert's first reply shows that the birthday is not May or June (if it were either of these, then the birthday might have been identifiable from the day alone, so he could not be sure that Bernard did not know it).
Bernard's reply shows that the day is not the 14th, or he would not have enough information.
Albert's further reply shows that the month is July, or he would not have enough information (if the month were August then he still could not know if it were the 15th or 17th).
Therefore the birthday is July 16th.
Wow..you are of of the genius here, hehe..Thanks,-
Albert has 4 choices for months. Let's narrow it down...
Since he states that Bernard "doesn't know" the Birthday, (a completely bald assertion, by the way) that eliminates the days of 19 and 18, and, by implication, the months of May and June. Since there is only one birthday choice for each of those days.
Thus, Bernard has only 4 remaining choices for days -- 14, 15, 16, 17. Let's narrow it down again, quickly...
16 is the only day that doesn't have a "double occurrence," (14, 15, or 17 all have two choices, thus leaving the choice of day uncertain), so Bernard's choice must be the 16th, and it must also be July, as a result of the previous bald assertion described above.
In a nutshell, the language gives you a head-fake, and if you understand the slippery logic, it makes you think you are a genius ?? Don't believe it.
This word problem (and the silly banter in which is in embedded) is deliberately designed to hide the solution, which is ultimately based on not one, but two bald assertions. QED.
Undoubtedly, there's some Boolean Algebra representation for this nutty word play. That's probably why it appeals to eccentric chessplayers, and math geeks.
IF they told you directly -- "It's NOT May or June, NOT 18 or 19, and NOT 14, 15, or 17," THEN the answer jumps right out at you. It's July 16, by default.
Neat Trick, but who needs the headache ? Pass me an aspirin. 
Apr 16, 2015
0
#314
Yes. Chess has a finite amount of moves. Eventually every move will be found by a super computer through calculation.
Don't hold your breath on that one.
Hundreds of threads have beaten that dog to death.
If it were a cat, all nine lives were long gone.
Apr 16, 2015
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#316
PaullHutchh wrote:
Yes. Chess has a finite amount of moves. Eventually every move will be found by a super computer through calculation.
im curious. how do you know that ?
Apr 17, 2015
0
#318
Yeah, that was a fun one. I spent more than half an hour on that puzzle.
I didn't know it went viral.
Now that you mention it, I think I saw them both at my family reunion, but I can never remember who is who at those things...my family is too big...