Hello, I'm Robin Hents.

And I'm Brian Cox.

And welcome to the podcast version of the Infilate Monkey Cage,

which contains extra material that wasn't considered good enough for the radio.

Enjoy it.

Hello, I'm Robin Hents.

And I'm Brian Cox.

And we are the Edinburgh Fringe Festival, a month where the Edinburgh Zoo expands its boundaries

across the whole of the city.

A comedian in every possible cage, a dance troop in every possible Avery,

an angry packs of Shakespeareans roaming the parks.

Do not feed the Stephen Burkhoffs.

He's snappy.

Also, as well as being home to nervous, a weepy and drunk performer

that is the birthplace of David Hume, one of the world's great philosophers and empiricists.

And today, much to Brian's anoints her as a possibility.

We will stray from science in to philosophy.

Yes, today's show is inspired by a letter from a listener.

This was from Diego Tremaine.

And he wrote, or asked us, whether there might be a genetic basis for narrow-minded intolerance.

And if so, whether a cure might be found.

So, to paraphrase, basically what he said, what he was asking is, is irrationality genetic?

...