Exercices on rationality

[Shin]

Is there books/websites full of the following exemples ?

I heard there is a book from David Kahnemann, but which one is it please ?

 

 

If a ball and a racket cost 11, and if a racket cost 10 more than a ball, how much does a ball cost ?

a) 0,5    b) 1    c) 2

 

 

(Richard=not married) <--- (Lea=???) <--- (Jon=married)

<--- = person on the right sees the person on the left

If Richard isn't married and Jon is married, is there a married person watching someone that isn't married ?

a) Yes. b) No. c) We can't know

 

 

Have fun, please don't give the answers until tomorrow, give some time to make people brain fry ?

Edited November 25, 2018 by Shin

[Shin]

No one ? ???

[Strikr]

j'ai rien compris mais je rigole tellement

[Outer]

First question: 1 since ball + racket is 11,  and racket costs 10 more.

15 hours ago, Shin said:

If Richard isn't married and Jon is married, is there someone watching someone that isn't married ?

yes, Lea, since she is watching richard that isn't married.

[Shin]

2 minutes ago, Outer said:

First question: 1 since ball + racket is 11,  and racket costs 10 more.

yes, Lea, since she is watching richard that isn't married.

Wrong on the first, no explanation for the second (so wrong too).

☺

[Shin]

I didn't write the good question for the second exercice (it is in the op now).

 

(Richard=not married) <--- (Lea=???) <--- (Jon=married)

<--- = person on the right sees the person on the left

If Richard isn't married and Jon is married, is there a married person watching someone that isn't married ?

a) Yes. b) No. c) We can't know

[Outer]

Just now, Shin said:

Wrong on the first, no explanation for the second (so wrong too).

☺

So it is.

It's mental shortcuts, heuristics, that are commonly wrong. It's from the book Thinking Fast and Slow.

There's also some exercises and examples in this book, but I haven't read it all.

https://www.lesswrong.com/rationality

[Outer]

3 minutes ago, Shin said:

If Richard isn't married and Jon is married, is there a married person watching someone that isn't married ?

C, we can't know, because we don't know what's Lea's relationship status. Someone who says yes is assuming, which is common on this forum. Is this right?

[Shin]

You're saying what kind of exercices they are, but you are still wrong on both of them.

There is 0% assumption to have to find the answers, just need to think beyond your wrong intuition.

[Torkys]

3) Is there a spoon? 

a) Yes

b) No

c) Both

d) We can't know

[Outer]

39 minutes ago, Shin said:

You're saying what kind of exercices they are, but you are still wrong on both of them.

There is 0% assumption to have to find the answers, just need to think beyond your wrong intuition.

I know I'm wrong on the first one but how am I wrong on the second one? Dunno what to search for to find the answer.

[Strikr]

ha yes ( now I've been reading haha )

 

I've seen a video of a guy talking about this "false assumption intuit" it was better explain and he try on people ( and they almost all had it wrong )

can't tell the book, but I did find a video on the same idea ( it was "popular" )

Edited November 25, 2018 by Strikr

[Shin]

Surely somene has the answers ?

[Outer]

40 minutes ago, Shin said:

You're saying what kind of exercices they are, but you are still wrong on both of them.

There is 0% assumption to have to find the answers, just need to think beyond your wrong intuition.

 

48 minutes ago, Shin said:

If Richard isn't married and Jon is married, is there a married person watching someone that isn't married ?

a) Yes. b) No. c) We can't know

Oh so the answer is B, no.

[Shin]

3 minutes ago, Outer said:

 

Oh so the answer is B, no.

Wrong again lol

[Outer]

1 minute ago, Shin said:

Wrong again lol

How am I wrong, if I've said all three options?

[Harikrishnan]

First question answer is 0.5

[Harikrishnan]

When Einstein wrote this riddle he apparently said that 98% of the world would 
not be able to solve it:
There are 5 houses in five different colours.
In each house lives a person with a different nationality.
These five owners drink a certain type of beverage, smoke a certain brand of 
cigar and keep a certain pet.
No owners have the same pet, smoke the same brand of cigar or drink the 
same beverage.
The question is: Who owns the fish?
Hints
The Brit lives in the red house
The Swede keeps dogs as pets
The Dane drinks tea
The green house is on the left of the white house
The green house's owner drinks coffee
The person who smokes Pall Mall rears birds
The owner of the yellow house smokes Dunhill
The man living in the centre house drinks milk
The Norwegian lives in the first house
The man who smokes blends lives next to the one who keeps cats
The man who keeps horses lives next to the man who smokes Dunhill
The owner who smokes BlueMaster drinks beer
The German smokes Prince
The Norwegian lives next to the blue house
The man who smokes blend has a neighbour who drinks water

puzzle.pdf 

Here is one for u @Shin

Edited November 25, 2018 by Harikrishnan

[Shin]

12 minutes ago, Harikrishnan said:

First question answer is 0.5

37 minutes ago, Outer said:

 

Why ?

 

37 minutes ago, Outer said:

 

Easy to tell all the options and not explaining why ☺

[Outer]

2 minutes ago, Shin said:

 

Why ?

 

 

Easy to tell all the options and not explaining why ☺

I am a genius, You win by being wrong two times on a 3 option question!