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# Cheryl's Birthday Logic Problem

 Posts: 12,906 Add as FriendChallenge to a DebateSend a Message 4/16/2015 12:15:50 AMPosted: 2 years agoProblem: http://i2.cdn.turner.com...Video Solution: http://www.cnn.com..."When I see the city from my window - no, I don't feel how small I am - but I feel that if a war came to threaten this, I would throw myself into space, over the city, and protect these buildings with my body."
 Posts: 9,112 Add as FriendChallenge to a DebateSend a Message 4/16/2015 12:36:54 AMPosted: 2 years agoMy friend texted me this problem a few days ago before I knew it was a thing. Took me a few minutes but I got it."You assume I wouldn't want to burn this whole place to the ground." - lamerde https://i.imgflip.com...
 Posts: 22,210 Add as FriendChallenge to a DebateSend a Message 4/16/2015 1:07:00 AMPosted: 2 years agoI don't get it. There isn't enough information here to definitively conclude anything, in my opinion."I will.....not suck your dick," Sui_generis
 Posts: 22,210 Add as FriendChallenge to a DebateSend a Message 4/16/2015 1:08:51 AMPosted: 2 years agoWhy is this b1tch being so secretive about her birthday anyway?"I will.....not suck your dick," Sui_generis
 Posts: 22,210 Add as FriendChallenge to a DebateSend a Message 4/16/2015 1:21:43 AMPosted: 2 years agoBasically a list of ten birthdays is given and neither person knows when the birthday is. In sentence one Albert states that neither him or his friend knew the birthday, but that fact has already been established, each only knows a part of the birthday.Then after that sentence both have an epiphany and know when the birthday is. This is BS."I will.....not suck your dick," Sui_generis
 Posts: 478 Add as FriendChallenge to a DebateSend a Message 4/16/2015 2:00:31 AMPosted: 2 years agoAt 4/16/2015 1:21:43 AM, Wylted wrote:Basically a list of ten birthdays is given and neither person knows when the birthday is. In sentence one Albert states that neither him or his friend knew the birthday, but that fact has already been established, each only knows a part of the birthday.Then after that sentence both have an epiphany and know when the birthday is. This is BS.No, it's tricky, but there is enough information. Albert's first statement rules out five options. Bernard's statement rules out two more, and Albert's last statement rules out the last two incorrect dates. The last two are the trickiest ones, but it is doable.To say one has free will, to have chosen other than they did, is to say they have will over their will... Will over the will they have over their will... Will over the will they have over the will they have over their will, etc... It's utter nonsense.
 Posts: 2,996 Add as FriendChallenge to a DebateSend a Message 4/16/2015 8:25:39 AMPosted: 2 years agoThe problem is fine, until you reach interpreting the dialogue between Albert and Bernard.Firstly, there is no contextual dialogue to give indication of when this conversation took place. Did it immediately take place after Cheryl told them the information?Secondly, how on Earth are we meant to limit the possible interpretations of "at first" in Bernard's dialogue? What does "at first" mean precisely? Does it mean before I was told the information? Does it mean after I exchanged information with Albert? The solution implies that this was after information exchange, but it specifically says that Cheryl told them separately.It's a poorly worded question. I would just answer with: 'on the day she was born' and relish in the thought of an incoming tick.Thank you, DDO -- http://www.debate.org... 5 minute, quick and easy vote -- http://www.debate.org...
 Posts: 14,075 Add as FriendChallenge to a DebateSend a Message 4/16/2015 11:56:22 AMPosted: 2 years agoAt 4/16/2015 8:25:39 AM, Zarroette wrote:The problem is fine, until you reach interpreting the dialogue between Albert and Bernard.Firstly, there is no contextual dialogue to give indication of when this conversation took place. Did it immediately take place after Cheryl told them the information?Secondly, how on Earth are we meant to limit the possible interpretations of "at first" in Bernard's dialogue? What does "at first" mean precisely? Does it mean before I was told the information? Does it mean after I exchanged information with Albert? The solution implies that this was after information exchange, but it specifically says that Cheryl told them separately.All of these stages took place in quick succession and no other conversation occurred between, before, or after them. The start of the problem is when Cheryl gives out the original information - there are no references to anything before this. The problem is self-contained - the only things that happened are what are explicitly stated.Stage one: The only information known by either character is the information Cheryl told them individually.Stage two: Albert says his sentence and nothing else.Stage three: Bernard says his sentence and nothing else.Stage four: Albert says his sentence and nothing elseIt's a poorly worded question. I would just answer with: 'on the day she was born' and relish in the thought of an incoming tick.Incoming tick?#UnbanTheMadman "Some will sell their dreams for small desires Or lose the race to rats Get caught in ticking traps And start to dream of somewhere To relax their restless flight Somewhere out of a memory of lighted streets on quiet nights..." ~ Rush
 Posts: 9,991 Add as FriendChallenge to a DebateSend a Message 4/16/2015 12:26:01 PMPosted: 2 years agoAt 4/16/2015 12:15:50 AM, dylancatlow wrote:Problem: http://i2.cdn.turner.com...Video Solution: http://www.cnn.com...This one is fun, but not that hard.Albert has the month, so his unknown is day. The possible unknowns are15, 16, 19OR17, 18OR14, 15, 17Bernard says, if Albert is so dam sure I don't know then, and I have a number. Bernard his to reason with.- 19 only shows ONCE. Albert cant be sure I don't know if the date is in May. Eliminate ALL OF MAY- 18 has the same issues as 19. I can eliminate June.- Now, we have ONE month with three dates. I Bernard, have that number, I have month and date.
 Posts: 9,379 Add as FriendChallenge to a DebateSend a Message 4/16/2015 12:30:29 PMPosted: 2 years agoAt 4/16/2015 1:21:43 AM, Wylted wrote:Basically a list of ten birthdays is given and neither person knows when the birthday is. In sentence one Albert states that neither him or his friend knew the birthday, but that fact has already been established, each only knows a part of the birthday.Then after that sentence both have an epiphany and know when the birthday is. This is BS.Actually, it is quite simple; you just have to think."...when someone mentions feminazis, my favorite number..." ~PeterSmith "Add that to the Bible, I guess." ~Max "Isn't everything on this site my arbitrary whim?" ~Max "If anyone wants to engage in casual anti-Semitism, then whatever." ~Max Vaarka swung his sword at the mod. However, since I am now incorporeal, he ends up accidentally striking the entire American landmass (It's a REALLY bastard sword), destroying both continents. Spiders are now at 50% of capacity."
 Posts: 9,991 Add as FriendChallenge to a DebateSend a Message 4/16/2015 12:32:38 PMPosted: 2 years agoAt 4/16/2015 12:30:29 PM, The-Voice-of-Truth wrote:At 4/16/2015 1:21:43 AM, Wylted wrote:Basically a list of ten birthdays is given and neither person knows when the birthday is. In sentence one Albert states that neither him or his friend knew the birthday, but that fact has already been established, each only knows a part of the birthday.Then after that sentence both have an epiphany and know when the birthday is. This is BS.Actually, it is quite simple; you just have to think.Like the bu11shit facebook memes "Your a genius" things, the trick is in thinking its hard in any way.
 Posts: 9,379 Add as FriendChallenge to a DebateSend a Message 4/16/2015 12:34:48 PMPosted: 2 years agoAt 4/16/2015 12:32:38 PM, TBR wrote:At 4/16/2015 12:30:29 PM, The-Voice-of-Truth wrote:At 4/16/2015 1:21:43 AM, Wylted wrote:Basically a list of ten birthdays is given and neither person knows when the birthday is. In sentence one Albert states that neither him or his friend knew the birthday, but that fact has already been established, each only knows a part of the birthday.Then after that sentence both have an epiphany and know when the birthday is. This is BS.Actually, it is quite simple; you just have to think.Like the bu11shit facebook memes "Your a genius" things, the trick is in thinking its hard in any way.Yep. It is meant to intimidate and scare people into believing it is hard. Just because you can solve it does not mean you are a genius."...when someone mentions feminazis, my favorite number..." ~PeterSmith "Add that to the Bible, I guess." ~Max "Isn't everything on this site my arbitrary whim?" ~Max "If anyone wants to engage in casual anti-Semitism, then whatever." ~Max Vaarka swung his sword at the mod. However, since I am now incorporeal, he ends up accidentally striking the entire American landmass (It's a REALLY bastard sword), destroying both continents. Spiders are now at 50% of capacity."
 Posts: 13,835 Add as FriendChallenge to a DebateSend a Message 4/16/2015 12:46:46 PMPosted: 2 years agoIs it July 16th? I just made a table like I used to in elementary school...
 Posts: 9,379 Add as FriendChallenge to a DebateSend a Message 4/16/2015 1:15:32 PMPosted: 2 years agoAt 4/16/2015 12:46:46 PM, RevNge wrote:Is it July 16th? I just made a table like I used to in elementary school...Yes."...when someone mentions feminazis, my favorite number..." ~PeterSmith "Add that to the Bible, I guess." ~Max "Isn't everything on this site my arbitrary whim?" ~Max "If anyone wants to engage in casual anti-Semitism, then whatever." ~Max Vaarka swung his sword at the mod. However, since I am now incorporeal, he ends up accidentally striking the entire American landmass (It's a REALLY bastard sword), destroying both continents. Spiders are now at 50% of capacity."
 Posts: 13,835 Add as FriendChallenge to a DebateSend a Message 4/16/2015 2:30:53 PMPosted: 2 years agoAt 4/16/2015 1:15:32 PM, The-Voice-of-Truth wrote:At 4/16/2015 12:46:46 PM, RevNge wrote:Is it July 16th? I just made a table like I used to in elementary school...Yes.Woot :DDo I get cake for being right?
 Posts: 12,906 Add as FriendChallenge to a DebateSend a Message 4/16/2015 4:41:44 PMPosted: 2 years agoIt took me like an hour to solve. I probably would have been quicker if I wrote things down."When I see the city from my window - no, I don't feel how small I am - but I feel that if a war came to threaten this, I would throw myself into space, over the city, and protect these buildings with my body."
 Posts: 9,379 Add as FriendChallenge to a DebateSend a Message 4/17/2015 7:02:36 AMPosted: 2 years agoAt 4/16/2015 2:30:53 PM, RevNge wrote:At 4/16/2015 1:15:32 PM, The-Voice-of-Truth wrote:At 4/16/2015 12:46:46 PM, RevNge wrote:Is it July 16th? I just made a table like I used to in elementary school...Yes.Woot :DDo I get cake for being right?Nah."...when someone mentions feminazis, my favorite number..." ~PeterSmith "Add that to the Bible, I guess." ~Max "Isn't everything on this site my arbitrary whim?" ~Max "If anyone wants to engage in casual anti-Semitism, then whatever." ~Max Vaarka swung his sword at the mod. However, since I am now incorporeal, he ends up accidentally striking the entire American landmass (It's a REALLY bastard sword), destroying both continents. Spiders are now at 50% of capacity."