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Game theory challenge: Can you predict human behavior? - Lucas Husted 

TED-Ed
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Solve this classic game theory challenge: given integers from 0 to 100, what would the whole number closest to ⅔ of the average of all numbers guessed be?
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Given a range of integers from 0 to 100, what would the whole number closest to 2/3 of the average of all numbers guessed be? For example, if the average of all guesses is 60, the correct guess will be 40. The game is played under conditions known to game theorists as “common knowledge:” every player has the same information- they also know that everyone else does too. Lucas Husted explains.
Lesson by Lucas Husted, directed by Anton Trofimov.
Animator's website: www.antontrofimov.com
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11 июл 2024

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Комментарии : 1,3 тыс.   
@TEDEd
@TEDEd 4 года назад
The results are in! With over 5,800 responses, the average guess was 8.96, so the correct guess for 2/3 of the average was 6. 169 people (3% of those who submitted answers) guessed the right answer. Well done, 3%ers! Thanks for playing, everyone! Keep an eye out for future game theory games.
@timezone5259
@timezone5259 4 года назад
Yes
@vatanrangani8033
@vatanrangani8033 4 года назад
@@timezone5259 my guess is 6
@Tom-oi2tm
@Tom-oi2tm 4 года назад
I'm gonna post it in the comment and you can't stop me
@gabrielpop4966
@gabrielpop4966 4 года назад
But when will you do Think like a coder episode 3?
@tijmenvanarkel2735
@tijmenvanarkel2735 4 года назад
my guess is 100
@MatthewSmith-wx9wy
@MatthewSmith-wx9wy 4 года назад
Anytime Ted-ED poses me a question starting with "Can you...", I already know the answer's no.
@SpectrumTheOriginator
@SpectrumTheOriginator 4 года назад
Me too 😂
@aprilspencer4836
@aprilspencer4836 4 года назад
😂😂😂
@f.n30
@f.n30 4 года назад
im her wondering : what do you mean by :"what the two thirds of the new average will be. "
@HydraSR
@HydraSR 4 года назад
This is called self-fulfilling prediction.
@hojanson7331
@hojanson7331 4 года назад
Can you comment? Can you spell? Can you think? Can you talk?
@IlleScrutator
@IlleScrutator 4 года назад
Basically the scientific explanation of the "what if he knows that I know that he know that I know that he knows..." phenomenon... And I enjoyed it ")
@neogery
@neogery 4 года назад
they know that we know that they know that we know...
@vishalbhowmick2706
@vishalbhowmick2706 4 года назад
@@neogery Monica Geller entered the chat.
@Solqueen86
@Solqueen86 4 года назад
I hate that. Cus then he know that I know but I know that he knows but he could not know but say he does but I my know he knows that he does not know
@username4702
@username4702 4 года назад
I thought the same thing!!
@joose4650
@joose4650 4 года назад
Y did this help me understand the theory better than the video did?
@alphajo1169
@alphajo1169 4 года назад
k level reasoning in daily life: Rock paper scissors
@dzaqwanamir
@dzaqwanamir 4 года назад
Daily? The last time I played that was few years ago. Oh god, I need some friends
@Graveyardgirl33
@Graveyardgirl33 4 года назад
Yeah it's a super good example. You need to think ahead but ypu are scared that your opponent will also go ahead so you end up tying all the time lol
@AbdulGoodLooks
@AbdulGoodLooks 4 года назад
Get this guy to 1000 likes
@FalseRadiation
@FalseRadiation 4 года назад
In Rock Paper Scissors if you have a k level of zero you have a 1/3 chance of beating your opponent if they over think
@AbdulGoodLooks
@AbdulGoodLooks 4 года назад
@@FalseRadiation XD yes!
@ellencoleman4683
@ellencoleman4683 4 года назад
I'm operating at k level 0 at all times ✌️✌️
@ourochroma
@ourochroma 4 года назад
same haha
@custos3249
@custos3249 4 года назад
Says the k-level 10
@yuenhai
@yuenhai 4 года назад
Brilliant It's the only way to operate
@Mayhamsdead
@Mayhamsdead 4 года назад
So "meta" of you.
@ayselimanova9511
@ayselimanova9511 4 года назад
K1 for me (I hope I got the logic of the video exactly)
@05strange
@05strange 4 года назад
They know we know they know we know
@neebo95
@neebo95 4 года назад
Joey Tribbiani dislikes this comment.
@lookmomnohands0391
@lookmomnohands0391 4 года назад
I was actually able to understand this
@sashadali8464
@sashadali8464 4 года назад
The messers, become the messees! 😎
@mxd3bill70
@mxd3bill70 4 года назад
Oi bishal katuwal?
@fatih3806
@fatih3806 4 года назад
Yeah, I know.
@beytullahberk3632
@beytullahberk3632 4 года назад
had a stroke watching this
@alexandradordzhieva3835
@alexandradordzhieva3835 4 года назад
Ok.
@milo-sq3sd
@milo-sq3sd 4 года назад
What
@katerinakol5558
@katerinakol5558 4 года назад
HAHAHAHA Also, if this is true, have a SLT check for symptoms of dysphagia ASAP! This could save your life. (A Lil information never hurt anyone!)
@katerinakol5558
@katerinakol5558 4 года назад
@Eric Lee 1/2 of all strokes are linked to dysphagia, which can be deadly if left untreated. A certified speech and language pathologist should run a screening test asap, to check if the patient is in danger or not.
@misskmcp
@misskmcp 4 года назад
Well, imagine me, not native english speaker, trying understand all that he just said. And even if was in portuguese I think I wouldn't understand totally. At least I tried lol...
@apiiidme
@apiiidme 4 года назад
What smell is this? Did someone burn something? Oh, nevermind that's just my brain trying to comprehend this.
@senazri
@senazri 4 года назад
_😆😆😆_
@willowdress3280
@willowdress3280 4 года назад
I was like whaaatt is he talking about
@Natalia-cm8ez
@Natalia-cm8ez 4 года назад
😂😂😂same
@baze3541
@baze3541 3 года назад
Right, right, because you are so shocked and surprised at how much irrational people really are, I get ya.
@silvervirio3642
@silvervirio3642 3 года назад
Me to my brain: Its okay brain you can take your time.
@clarissapeyton7466
@clarissapeyton7466 4 года назад
"everyone knows this" Me: 👁️👄👁️
@Asmaa_311
@Asmaa_311 4 года назад
Lol
@Natalia-cm8ez
@Natalia-cm8ez 4 года назад
Lmao
@ratul_org
@ratul_org 3 года назад
🤣
@blazingfire_0712
@blazingfire_0712 2 года назад
Even if everyone knows this, it'll be the same since you'd know that they'll do it, and you can predict them easily.
@brunonotthemars7856
@brunonotthemars7856 Год назад
This concept was explored in a game from the "Alice in Borderland" series. It was basically the survey, but if you guessed wrong, sulfuric acid would kill you. Fun!
@PotatoBoiOfficial
@PotatoBoiOfficial Год назад
yessss that was a great manga
@tobirivera-garcia1692
@tobirivera-garcia1692 11 месяцев назад
It is also a live action show on Netflix.
@Im_theproblem__
@Im_theproblem__ 10 месяцев назад
It reminded me of that as well. Chishiya is just too good 💀
@osse1n
@osse1n 4 года назад
"In real world, people aren't perfectly ration or doesn't expect others to be perfectly rational" Well hot daaamn, story of my life - said almost everyone
@Asmaa_311
@Asmaa_311 4 года назад
True and so that i avoid people ....☺
@pustota7254
@pustota7254 Год назад
*rational
@rizqibaskoro8857
@rizqibaskoro8857 4 года назад
everyone: it's should be 0 me: what was 2/3 of hundred again?
@mcventi4859
@mcventi4859 3 года назад
66666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666
@deltamico
@deltamico 3 года назад
If i counted correctly that's almoust 2/3 of 10^883
@sukhmandersingh4306
@sukhmandersingh4306 3 года назад
@@mcventi4859 i believe it's time for you to learn a new symbol.
@hienanhtran2546
@hienanhtran2546 4 года назад
The k-level reasoning thing reminds me of a manga named 'Liar Game' that's so satisfying to read. The main characters are geniuses playing psychological game against each other, using this multi-level way of thinking ahead. It's just plain awesome.
@izmeuhu697
@izmeuhu697 3 года назад
Hiền Anh Trần yeah, it is very related. I did a phd in game theory (behavioural science) and illustrated these games to my colleagues (postdoc and professors in game theory) at some point and they were also intrigued by them. At some point we considered doing an experimental variation based on the stationary roulette game based on the manga. 🙂
@user-di2ec1ln4o
@user-di2ec1ln4o 2 года назад
thank you for the sauce!
@us.er888
@us.er888 2 года назад
read classroom of the elite
@kevinwijayaoey281
@kevinwijayaoey281 2 месяца назад
That's worth re-reading again! In fact there's a drama based on it. Not sure if it's still around though...
@Coughing360
@Coughing360 4 года назад
When it comes to human behavior, it depends on how well you know their habits and ways of thinking. Due to how complex humans can think and how smart we can be, there would be multiple results on how we could act and it would depend on how well we know people and humans in general.
@leraplaksyva2031
@leraplaksyva2031 Год назад
Yeah it’s much easier to tel when you know the person you are trying to predict with strangers it’s much harder
@gialmanzur
@gialmanzur 4 года назад
Lol we were just talking about this in my microeconomics class
@nozithelof6431
@nozithelof6431 4 года назад
Uct
@havoc4339
@havoc4339 3 года назад
Which topic?
@richadastonish5249
@richadastonish5249 4 года назад
"Want more game theory?" . . Uhmm...I think my brain had enough for today.
@irneplend
@irneplend Месяц назад
100 likes with no reply??? I'll help you break out of this awkward situation :) Btw I AM THE 100TH PERSON TO LIKE THE COMMENT NOT ANYONE ELSE
@gatlinmyer6976
@gatlinmyer6976 4 года назад
When you say 21 out loud ironically to yourself and then you’re right
@BlueBeBlue
@BlueBeBlue 4 года назад
I said 20 ;-;
@doodle4024
@doodle4024 4 года назад
I said 22 haha
@emperortgp2424
@emperortgp2424 4 года назад
K Level infinity
@MnMEminem
@MnMEminem 4 года назад
I said 15 so I am correct about real world conditions ;)
@awesomeallyse
@awesomeallyse 3 года назад
I also said 21 we all know each other too well
@sumitanne3840
@sumitanne3840 4 года назад
I'm K negative.. because there is category group of people who didn't understand the question itself...?🤔...includes myself🙄
@pickytop4381
@pickytop4381 4 года назад
LOL
@Speireata4
@Speireata4 4 года назад
I am in that group too, maybe because I didn't see the original wording or maybe there was a video explaining the question that I did not see.
@startrillion6050
@startrillion6050 4 года назад
well like its simply trying to guess what everyone thinks like at k0 no one thinks so u go with a random number but at k1 u assume there are k0 ppl and try to guess a number now u assume there are k1 ppl its basically u having a certain thought process and answering based upon if everyone had the thought process . And a tip if u are trying to understand things easily try to like explain it to urself out loud as if u are explaining it to someone else if u read this thank you for taking time to read this.
@MultiFabar
@MultiFabar 4 года назад
The question is really 3 steps: 1st: people guessed a number between 1-100 2nd: what do you think is the average number guessed for all numbers recorded? 3rd: The real question. Now that you have that average number in mind, what whole number is 2/3 of it? So if you think the average was 60, then your answer is 2/3 of 60 which is 40. I know your comment is old but I hope it helped!
@christlenz8148
@christlenz8148 3 года назад
star trillion I’m confuse how people would be able to guess the right answer
@aubreeswart2206
@aubreeswart2206 4 года назад
If I were a math teacher, they wouldn’t let me teach Game Theory bc I would end every class with « BuT tHaTs JuSt A tHeOrY »
@olamohammed5505
@olamohammed5505 Год назад
A gAMe tHeoRY
@soupspam1495
@soupspam1495 4 года назад
that k level thing sounded familiar, and then I realized that was how I played club penguin card jitsu
@idk-un3ty
@idk-un3ty 4 года назад
same
@joecelynk
@joecelynk 4 года назад
sameeeeee!!!! i get so stoked whenever i have a 6 game winning streak lol
@robertjarman3703
@robertjarman3703 3 года назад
@Abhinandan Katoch Back when Club Penguin was still around, the idea was that you had a trio of basic cards. Water, fire, and snow. Fire beats snow, snow beats water, and water beats fire. Cards are numbered 2-12 and if you guess the same element, the one with higher numbers beats the other, and if they are still tied, the round is null. Each card also has a colour, and so you win by either having three cards of the same element in all three different colours or three cards of different elements of three different colours. You can see what your opponent's colours have been, and have a record of your own. Ergo, you are able to guess that the other player will be more likely to choose cards that help them win the game and get to that diversity of cards, but the other player knows this much of you just as much and also knows that you would prefer to play cards that help you win in the same way, and you know that they know, they know that you know that they know, and so on. It was a brilliant game.
@davynoe0
@davynoe0 4 года назад
What's interesting is that if you convince everyone to choose 0, they all win but if one of them chooses something else nobody wins. If you explain that to every participant they could all choose 0 because otherwise they lose. But there will be at least one troll that wants to screw everyones winning chance...
@holy_nuke8479
@holy_nuke8479 3 года назад
yeah that's literally what i thought . you'd have a couple of trolls choosing 100 , and a couple of rational thinkers understanding that there would be trolls , so they increase their bet them selves . and the cycle repeats , that's why the result was an off 6
@inakiloriente
@inakiloriente 3 года назад
No, everyone who chooses 0 wins because they are closer to the answer.
@fraidei2094
@fraidei2094 3 года назад
@@inakiloriente the rules didn't say that you win by being the closest to the answer
@timthielke3541
@timthielke3541 3 года назад
@@fraidei2094 Implicitly, they do. They said that if everyone guessed 100, the winner would select 67 (or maybe 66). Either way, that's not actually 2/3, but just close to it. Maybe they meant that the winning guess is 2/3 of the average but rounded to the nearest integer. Even if so, with a large group, if there are fewer than 1% trolls, everyone who picks 0 wins.
@xellos5262
@xellos5262 2 года назад
@@timthielke3541 The problem is that out of 1000 people in the internet you have round about 200 trolls, 300 morons, and another 300 idiots. With this being a filtered bubble, you can assume that on Ted-Ed these numbers are a lot smaller, but they're still there, and it's more than 1% - even on this channel.
@markd8406
@markd8406 4 года назад
1 is also a Nash equilibrium, because they phrased it as the "closest integer to 2/3 the average guess", so if everyone guesses 1, everyone is right, (since the nearest integer to 2/3 is 1) and more than 2/3 of participants would need to guess 0 (with the remaining guessing one), in order to shift the answer to 0. So, while 0 is a Nash equilibrium, so is 1.
@Arbeitenification
@Arbeitenification 3 месяца назад
Thanks! Happy to see I am not the only one who is “that guy” ❤
@user-hi8jv6cw8n
@user-hi8jv6cw8n 4 года назад
Everyone guessing 21 cuz of the meme and actually getting it: *surprised Pikachu face*
@vaibhavpandey7202
@vaibhavpandey7202 4 года назад
2/3 of 21 ain't 21 so everyone lost🤔
@neicbeucno.2115
@neicbeucno.2115 3 года назад
@@vaibhavpandey7202 wha?
@ritulakhani8535
@ritulakhani8535 3 года назад
Which meme?
@lalatendupdeo4398
@lalatendupdeo4398 3 года назад
What there was a meme?
@aluksus9327
@aluksus9327 2 года назад
@@ritulakhani8535 I guess its 11 + 9 = 21 meme
@00kidney
@00kidney 4 года назад
Trust the actions, not what you hear from others, not what you believe...
@saphired02
@saphired02 3 года назад
Not every one thinks that way. So you thinking that way really just makes you a follower and not a leader. Unless now that you said that everyone is going to start thinking that way...
@KAIKIN
@KAIKIN 3 года назад
@@saphired02 well no. You don't even seem to understand the meaning of that sentence. Human can use lying words but not lying actions. Their actions reflect who they are because words and thinking can be deceived.
@skrrtskrrt2410
@skrrtskrrt2410 3 года назад
@@KAIKIN Even actions can be decieving. To truly get the best outcome, you have to utilize all of them equally, and even then, not every situation is the same. To rely only on one sense is setting yourself up for failure.
@KAIKIN
@KAIKIN 3 года назад
@@skrrtskrrt2410 well yes actors are some counter examples. What i meant was IRL actions are more trust able than words. Just look at the politicians.
@skrrtskrrt2410
@skrrtskrrt2410 3 года назад
@@KAIKIN Oh you sweet summer child. Ever heard of ulterior motives?
@mariusssssss
@mariusssssss 4 года назад
BUT THAT'S JUST A THEORY
@nadeshiko6810
@nadeshiko6810 4 года назад
a game theory!
@jellyfishjelly1941
@jellyfishjelly1941 4 года назад
a game theory theory!!!
@maartenvandijk3629
@maartenvandijk3629 4 года назад
@@jellyfishjelly1941 Thanks for watching
@ATERAH
@ATERAH 4 года назад
Omg this joke fits so well here
@M1chel4ngelo
@M1chel4ngelo 4 года назад
A FILM THEORY!
@LOL_YAY
@LOL_YAY Год назад
This is alice in the borderland
@kirbymarchbarcena
@kirbymarchbarcena 4 года назад
K-1: What do you think I'm thinking? K-O: That I'm a "Knock-Off"?
@AnanyaRao-le7tk
@AnanyaRao-le7tk Год назад
King of Diamonds game!!! Was so not expecting to find this. Now I understand Chishiya's reasoning :D
@laurel9629
@laurel9629 2 года назад
For the “second round” of the 2/3 game, I’m expecting at least half of the people to remember “0 is the best answer” and pick zero, and half to pick random numbers, pick 100 to be trolls, still pick 50 because the math is confusing, or pick 60 because the math is confusing. I pick 33.
@stormysamreen7062
@stormysamreen7062 4 года назад
3:57 Rare footage of Manchester United's only goal in 2019
@ardenr3533
@ardenr3533 2 года назад
proud to say that after a few months and a rewatch i understand what he’s talking about
@yobroh0
@yobroh0 2 года назад
Growth is a process - let’s keep at it!
@bhavikbagiya3878
@bhavikbagiya3878 3 года назад
"The weather today is partly suspicious with chances of betrayal." - Chuck Palanhuik, Diary: a Novel
@ahmadnajmiroslan
@ahmadnajmiroslan 4 года назад
*At the end of this video,I'm still confused*
@sharif47
@sharif47 4 года назад
If we're all smart and we know we're all smart, then the question essentially is... What is the value of x if 2/3 of x is also x? Now I'm so mad I didn't get this post in my recommendation.
@isieg575
@isieg575 4 года назад
0
@sharif47
@sharif47 4 года назад
@@isieg575 yes, exactly, as the video said.
@sharif47
@sharif47 4 года назад
@@whynot9579 I'm not smart enough to explain with the inclusion of dummies as they can not be predicted without statistics.
@hakesho
@hakesho 4 года назад
@@whynot9579 If everyone playing is a perfect logician and also knows that every other player is, then the reasoning is as follows: There will be some average x, since everyone playing knows this and also knows everyone else does etc. everyone will guess 2x/3 so the average will be 2x/3. But we defined x as the average so we have x = 2x/3. The only solution to this equation is x=0. Of course in practice the average is almost never 0 and there are reasons to guess something other than 0. One is if you're not smart enough to figure out the game, another is if you think other players aren't smart enough to figure out the game, or you might think other players think that other players aren't smart enough, etc. making this difficult to win with any real consistency.
@hakesho
@hakesho 4 года назад
@Eric Lee move the terms to one side then factor then divide. x = 2x/3 -> x - 2x/3 = 0 -> x(1 - 2/3) = 0 -> x=0. You can also kinda "guess" the answer by noticing any other number would change when multiplied by 2/3.
@jeffersonlam2969
@jeffersonlam2969 4 года назад
Thank you so much for this game theory video! This stuff is super fascinating and it's hard to find well-produced videos on it like this
@b.i.c.violet4545
@b.i.c.violet4545 4 года назад
Ah, the old game of "they know that we know that they know but they don't know that we know that. Or...do they?
@samuelhuggins4109
@samuelhuggins4109 4 года назад
i had a stroke reading that
@81peas
@81peas 3 года назад
some people know but some don't and only some know that some know and some don't.............................................
@deltamico
@deltamico 3 года назад
I would still go for 0 even if its unreal ^^
@kyro7482
@kyro7482 2 года назад
I always thought of people's decision making being based on their 'level of thinking', which was dependent on what level they thought the opponent was on, and thinking one level higher than that. Like how chess masters think ahead of their opponents, and how in death note L and Light used multiple layers of reasoning. Today I learned it actually has a name, and is called k-level of reasoning, wow.
@AdityaRaj-hp8tn
@AdityaRaj-hp8tn Год назад
Yeah constantly trying to outsmart in death note
@starcloak
@starcloak 4 года назад
Very fascinating, looking forward to the results.
@GermanZindro
@GermanZindro 4 года назад
This was a surprisingly difficult question to answer. I’m very excited to see the results!
@eknumberindia393
@eknumberindia393 4 года назад
I’m in love with this channel and their topics❤️ Thankyou for such informative insights💯 Grateful!
@sainandhebbar5694
@sainandhebbar5694 3 года назад
2:07 *My dog, silently watching me and my sis fighting over the TV's remote*
@weeb836
@weeb836 3 года назад
My cat : 👁️👄👁️
@michaelpenny9625
@michaelpenny9625 4 года назад
Finally, a TED-Ed challenge I knew how to solve before they explained it! Just learned this a few weeks ago in my evolutionary game theory course.
@ethanp.796
@ethanp.796 4 года назад
I want to learn to predict my friend's and enemy's next line
@bonflores8849
@bonflores8849 4 года назад
Was this your plan all along, *JOJO* !?
@water1793
@water1793 4 года назад
*Impossible!?!?*
@TheGamerGameplay1
@TheGamerGameplay1 4 года назад
YOUR NEXT LINE GONNA BEEEE.......
@rajns8643
@rajns8643 4 года назад
Niceeeeeeeeee
@gabrielcecatto6992
@gabrielcecatto6992 3 года назад
"1" would be a more robust choice. 2/3 of 1 is .66 which rounds to 1. 1 is closer to higher numbers than 0, so it would tolerate more change from people guessing randomly (since their average would be closer than if "0" was picked). Basically 1 is also a correct choice, so I don't see a nash equilibrium here. And if few people were to answer randomly, 1 would yield a more robust average, being more tolerant to changes while still granting a win if everyone acted logically.
@tungsten-726
@tungsten-726 3 года назад
Dude nice math! 👍
@Eshkirbel1
@Eshkirbel1 3 года назад
If you choose .66, the 2/3 game still applies, so it'll forever get closer to 0, between 0 and 1 you can find an infinite quantity of decimals... It'll always get closer to 0...
@gabrielcecatto6992
@gabrielcecatto6992 3 года назад
@@Eshkirbel1 but I chose 1, not .66
@Chipplez
@Chipplez 3 года назад
@@Eshkirbel1 you can't choose .66, as you have to guess "the whole number closest to 2/3 of the average of all guesses"
@lucaslayton3974
@lucaslayton3974 4 года назад
*"Shall we play a game?"* *- Jigsaw*
@DragoSonicMile
@DragoSonicMile 3 года назад
*I summon Slifer the Sky Dragon!* -Yami Yugi / Yugi Muto
@raelerminy1859
@raelerminy1859 4 года назад
I am a math and economics student and this video is one that made me feel proud about my academic formation.
@fannyyyyyyyy
@fannyyyyyyyy 4 года назад
What you guessed?
@sabr2211
@sabr2211 4 года назад
i guessed 0 after like 40 seconds of thinking, someone needs to get me off my high horse
@kuzuboshii
@kuzuboshii 4 года назад
You guessed wrong then. The point is to get the answer that reflects what other people will have chosen, not find the nash equilibrium. No horse needed.
@notspoileratall5471
@notspoileratall5471 4 года назад
2:01 That summarizes all my ranked matches in LoL
@luqcrusher
@luqcrusher 4 года назад
Sounds a bit like Princess Bride’s The Battle of Wits.
@jeromeorji1057
@jeromeorji1057 4 года назад
Iocane powder
@kylenetherwood8734
@kylenetherwood8734 4 года назад
K∞=poison both glasses
@mmmk1616
@mmmk1616 4 года назад
I thought of that too :)
@woopy6176
@woopy6176 3 года назад
I understood that reference
@hanhoang7883
@hanhoang7883 3 года назад
Lolol
@caro_irl
@caro_irl 4 года назад
this is also called the keynesian beauty contest! one of my favorite concepts in math
@cowpoke7317
@cowpoke7317 3 года назад
Short, sweet and got me a good understanding and filled with good detail and good material.
@sharvahalde6040
@sharvahalde6040 4 года назад
“Objective facts are Nash equilibrium points in the contest of competing wills.”
@fqidz
@fqidz 4 года назад
video: **has "theory" in the title** everyone: _bUt tHaT'S JuST a tHEory_
@JaswiL-_51
@JaswiL-_51 4 года назад
A: “I knew you were gonna do that so i did this” B: “I knew you were gonna do that so i did this” A: “I knew you were gonna do that too so i did this”
@pra_nish
@pra_nish 4 года назад
I love Ted-ed! ! Waiting for your upload!! Thanks for the video!😍😍
@ShayanPey
@ShayanPey 2 года назад
Well explained. Well animated. Perfect.
@qfox16789
@qfox16789 4 года назад
0- as I feel like once everyone’s been told the most logical knowing that everyone else was told it they should all go there?
@mmmk1616
@mmmk1616 4 года назад
They said don't post your answer here, there's a link in their top comment to a website they want people to give their guesses at :)
@raydo1998
@raydo1998 4 года назад
I'm part of the people believing not everyone is rational. Theorically, you're right but it's the internet and people are gonna troll and post other numbers. It's almost impossible to tell an entire community to do one thing if they have the opportunity to change the stakes
@naret03
@naret03 4 года назад
0 is the most logical if everyone thinks the same, but take me for example, I believe there will be people that won't choose 0, so I'll choose something bigger than 0, if there're many people like me, even knowing the logical answer, we won't answer 0. But what I can guess is that since more people know the most logical answer is 0, the new result will be closer to 0.
@maxyang466
@maxyang466 4 года назад
21, a meme, was the right number... wow. Ted Ed is a legend
@monafennel1493
@monafennel1493 2 года назад
this is by far the most interesting channel to learn things
@divitmaheshwari7132
@divitmaheshwari7132 4 года назад
Also i love all your videos and I've subscribed your channel too
@harshj.6211
@harshj.6211 4 года назад
Hey TED just a reminder, your subscribers are not that smart....... BTW thanks for sharing Knowledge as usual.... You are the BEST.....
@ladyphantomhive117
@ladyphantomhive117 4 года назад
Is the dialogue from The Sims? 😂
@supersayan9917
@supersayan9917 4 года назад
What a beautiful video to depress people like myself who can’t even comprehend 80% of the video. Nicely done Ted-Ed good job 👏
@bovaskunjukrishnan4138
@bovaskunjukrishnan4138 4 года назад
kinda hard to wrap my mind around but im amazed at the possibilities
@Epaminaidos
@Epaminaidos 4 года назад
It would have been interesting to see the graph of the guesses.
@AJLord
@AJLord 4 года назад
"Hello Internet, and welcome to Game Theory!"
@chickenalakingina
@chickenalakingina 4 года назад
>Tfw you guessed 22 >Tfw you forgot about the average
@BigMastah79
@BigMastah79 4 года назад
So sometimes it’s beneficial to think less. I am gonna be SOOOOO good at that!
@RayBlendertube
@RayBlendertube 4 года назад
Step 1: Confirm you have green eyes Step 2: Ask Ted-Ed to leave
@royhutauruk2432
@royhutauruk2432 3 года назад
This is funny and unfunny at the same time
@orrbezalely3332
@orrbezalely3332 4 года назад
I would like to point out something that I think ted forgot. Since the question is to select an INTEGER from 0-100 then once you reach to 1 and then take 2/3 of that, after rounding it you get 1. Thus you will never get to 0 on any k level.
@christianibarreta9794
@christianibarreta9794 4 года назад
it confuses me with that 67
@Zebacha
@Zebacha 2 года назад
That's exactly what I thought.
@krishgoenka7982
@krishgoenka7982 4 года назад
Just btw, to this question, the answer at the highest K level also, given that the average is to be a whole numbered value and the numbers whose average is taken are also whole numbers, would not reach 0. It would be 1. This is because at the last assumption, 2/3rds of 1 is 0.67 (but only if we allow non-integer type values, which are not allowed). This results in the 0.67 to be converted back to 1 (as 1 is closer to 0.67 than 0), n then this process is repeated infinite no. of times, each time the no. being 1 n not 0. Therefore, the correct answer (assuming everyone is K12 lvl intelligent), should be 1 n not 0.
@jk7074
@jk7074 4 года назад
This video is that what I needed
@majinfreecell
@majinfreecell 4 года назад
But remember! It´s just a theory, a GAME theory!
@technolus5742
@technolus5742 4 года назад
Holly cow! I thought everyone would say 0! This video just blew my mind. I'll now expect other people to be dimmer then I expected before. This also gives insight about how many steps ahead people usually think, which is nice to know.
@yobroh0
@yobroh0 2 года назад
It would be a true leap of faith to think every single person in a room would choose the exact same answer while they simultaneously trust everyone else to also choose the same answer based on the same reasoning. I wouldn’t bet my cat on it.
@monafennel1493
@monafennel1493 2 года назад
i love watching these videos
@Crosmert
@Crosmert 4 года назад
Like always, awesome video... so... what were the challenges again?
@thespaceace8164
@thespaceace8164 4 года назад
So, when someone says they're on a different level, this is what they mean.
@scottyc3379
@scottyc3379 4 года назад
All this math have me confuse 😂
@melisaangela
@melisaangela 4 года назад
Me too
@noobnoobyify
@noobnoobyify 4 года назад
Hello fellow k-0s
@FreyaFJ
@FreyaFJ 4 года назад
2:21 “pOliTiKeN” :)) just kidding. Great video.
@saltygrim4803
@saltygrim4803 3 года назад
If Rock Paper Scissors counts, I predict everyone’s moves while playing that game
@reynalee8
@reynalee8 3 года назад
I personally think it counts
@kaheichan9
@kaheichan9 4 года назад
I went straight to zero.. That means I was expecting others to play in the most logical way.. which turn out to be not common.
@sristiganguly4858
@sristiganguly4858 3 года назад
ay, same (turns out it's more common than you think)
@holy_nuke8479
@holy_nuke8479 3 года назад
that's in fact a missing logic level from yourself . you should guess that there would be trolls increasing the value on purpose and other thinkers guessing that trolls would do that , there for they would also increase their bet , and so one .
@pjkevinrodriguez532
@pjkevinrodriguez532 3 года назад
I chose 44 because middle ground somehow
@rakeshraveendra7411
@rakeshraveendra7411 4 года назад
If everything explained went above your head we should be friends 😂✌️
@gkgk6439
@gkgk6439 4 года назад
Rakesh Raveendra Yaaaay 😂
@swedaa8508
@swedaa8508 4 года назад
Mind blowing !
@trapscope6922
@trapscope6922 4 года назад
Thanks! This should help me with the Ted-Ed riddles
@wp9746
@wp9746 4 года назад
but hey that's just a theory *A G A M E T H E O R Y*
@milo-sq3sd
@milo-sq3sd 4 года назад
Aaaaand cut!
@twentytwentyoneishvkmemory7430
@twentytwentyoneishvkmemory7430 4 года назад
*A G A M E T H E O R Y T H E O R Y*
@antogledhill8094
@antogledhill8094 4 года назад
Well if everybody is logical then zero if their participants all know, but, we all like being a little different so; i'll say 4
@siddhiubale9511
@siddhiubale9511 3 года назад
I need to rewatch this video to understand it completely
@snowangelnc
@snowangelnc 4 года назад
Toward the end I started thinking about the poisoned goblets scene from The Princess Bride.
@ZiemniakPospolity
@ZiemniakPospolity 4 года назад
My guess was 22, I'm so proud of myself.
@kenneth2024
@kenneth2024 Год назад
Who’s here after watching Alice in Borderland? 😂😂
@Kaitlyn.Ashby04
@Kaitlyn.Ashby04 4 года назад
I love how I click on these every time thinking the videos will be simple
@sekhuz9810
@sekhuz9810 4 года назад
This voice is so good & does a good job
@garfield8793
@garfield8793 4 года назад
No one: Joepsh Joestar:
@rajns8643
@rajns8643 4 года назад
Niceeeeeeeeee
@runeemilgrnlundnielsen5875
@runeemilgrnlundnielsen5875 4 года назад
When you are from Denmark and you hear them say politiken Nej nej Nej
@ImmmaI
@ImmmaI 4 года назад
I'm Dutch but even I crinched
@ajani-lamar-_-3712
@ajani-lamar-_-3712 4 года назад
Ej den er gal
@anteater9408
@anteater9408 4 года назад
Then how do you say it?
@ajani-lamar-_-3712
@ajani-lamar-_-3712 4 года назад
@@anteater9408Difficult to explain over text, try searching online
@anteater9408
@anteater9408 4 года назад
@@ajani-lamar-_-3712 I googled it and heard "politeekuhn"
@jkvoot
@jkvoot 4 года назад
👍Thumbs up. Enjojed this
@determinationterminal5692
@determinationterminal5692 4 года назад
whenever there is a game I always think first about if there is a right answer when in fact these videos are teaching techniques and methods
@pa.o
@pa.o 4 года назад
I always watch these videos thinking I will understand them... Silly me 🙃
@Anonymous-jo2no
@Anonymous-jo2no 4 года назад
So K-level is basically "I know that you know that I know that you know that I know that you know that I will do X."
@anotsofabulouskilljoy
@anotsofabulouskilljoy 4 года назад
everytime i watch a ted ed video (especially those about paradoxes) i just end up being more confused than ever
@driziiD
@driziiD 4 года назад
and the narrator is brilliant as always
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