Just before this BBC podcast gets underway, here's something you may not know.

My name's Linda Davies and I Commission Podcasts for BBC Sounds.

As you'd expect, at the BBC we make podcasts of the very highest quality featuring the most knowledgeable

experts and genuinely engaging voices. What you may not know is that the BBC

makes podcasts about all kinds of things like pop stars,

poltergeist, cricket, and conspiracy theories and that's just a few examples.

If you'd like to discover something a little bit unexpected, find your next podcast over at BBC Sounds.

Hi there, Charlotte here with a little bonus podcast episode.

This week we're dedicating our program to one of our heroes. Social scientist Daniel

Kahneman who has died at the age of 90. We thought you might like to hear our

full interview with Danny from back in 2012 when Tim Harvard spoke to him about his new book at the time

thinking fast and slow.

I will tell you about a city in which two taxi companies operate and one of the companies has

operates green cars and the other operates blue cars. This is more or less I'm Tim

Harford and you're listening to Daniel Carnaman, a psychologist who won the Nobel Prize for economics.

85% of the cars are green and 15% blue.

Another was a hit and run accident at night, clearly involved a taxi.

And there was a witness who thought that the car was blue, belonged to the minority company.

And they tested the accuracy of the witness,

and they found that under similar conditions when you show the witness an equal number of cabs,

the witness was accurate 80% of the time.

Now what is your probability that the cab in question was blue, as the witness said, when

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