The only famous person I was ever able to trip it up on was John Waters of Hairspray! fame. I answered every question right and it still couldn’t get it. This was a short while back and I filled in who I was thinking of in the “You’ve defeated me” page, so it’s probably better now. (It gave me James Cameron).
Since everyone is familiar with the concept of a family tree, Imagine a similar tree structure, but one which consists of random people connected together.
They have been placed according to certain patterns like males on the left of the tree, females on the right at high level and then scientists on the left and teachers on the right at next level and so on.
The questions that you see on the screen is typically the logic applied at that node in a tree. Every question that you answer is used to select either a left or right part of the tree and you descend down the tree with your answer. Once the end of the tree is reached, we get answer we are looking for.
I get the math behind it but some times the thing will guess with pinpoint accueacry as if it knew.
Ah yes, male cartoon character
In an anime?
Do they fight with cards?
Oh could they be from Yu gi Oh?
Bam , Yu Gi Moto.
Next time , me thinking of Sora
Ah, male character.
Do they appear in a cartoon/video game series?
Before even asking for hair color or any trait. **Would you say this character fights with a Keyblade^TM**?
To go along with all the algorithms and math it does one other thing. Every time someone thinks of a person/character/whatever it records the questions and answers that got it there and adds them to the path for that specific result. Doesn’t always work but when 50,000 people all think of Goku it gets easier.
Goku: From an anime, black hair, male, transforms, fights, etc
100 people.
1 question, down to 50 people.
2nd question down to 25.
3rd, down down to 10
4th, down to 6.
At this point it likely realized the cost of returns for any question is lacking. It likely takes a guess based on the percentage of visitors that end up there, or if the odds are low enough asks another question to eliminate at least 1 possibility.
If you ask the right questions – questions that continually split the list of all possible people in half – you can uniquely identify any human on Earth in just 33 questions.
The questions therefore should be vague (that is, applies to about half of everyone) so that you eliminate as many possibilities in one question as possible, no matter what the answer is. If it’s too specific, the chance of the answer being “yes” is much smaller, and to worsen the matter, if the answer is “no”, then you only eliminated a small number of people with your question.
Have you ever played the game [*Guess Who?*](https://www.youtube.com/watch?v=a76UPzU2VXM&ab_channel=TripleSGames) It’s a game where you have to identify your opponent’s character by answering yes/no questions. You can ask something like “do they have blue eyes?” “do they have facial hair?” With each passing question, you narrow down the pool of candidates. Eventually, you eliminate everyone but one.
Akinator works the same way, except it’s a much large pool of candidates. However, they use user input to help them. Let’s say that you pick a character that nobody else has. Akinator will remember all your answers, and should someone think of that character at another time, Akinator will use your answers to help guide them to the correct solution. The more often people use the same character, the more refined the path the solution can get.
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