The

The From the home of the co-breakers and the birthplace of modern computing, this is the Bletchley Park podcast.

Hello, this is M.C. Fontaine, welcoming you to another Bletchley Park podcast Extra.

This week we have the concluding part of Professor Jack Copeland's talk which he gave at this year's Turing Education Day.

In this part, he concentrates on the Turing Test and Colossus.

He moved on to publish a paper in 1950, this famous paper of Turing that he called Computing Machinery and Intelligence.

And in it he described what we all today call the Turing Test, but he called the imitation game.

I guess everyone knows nowadays what the Turing test is.

You have three participants.

There's the judge, and then there's another human player, and then there's the computer that's under test,

and the judge, just by chatting to the other two players.

So kind of the equivalence of like texting them or emailing them or something, you're chatting to them by email.

On the basis of the conversation that the judge has, they have to try and say which is the computer and which is the human.

Turing said the computer can use any tricks it likes in order to evade identification, so the

computer can lie, it can give the wrong answer to questions like, you know, please multiply

these two huge numbers together.

If you say to it, are you the computer, it's allowed to say no, I'm the human being, and so on

and so forth.

If the computer manages to evade identification, if the judge can't do better

than the guessing rate of 50% at telling which is which, then the computer is said to have passed

the Turing test. What exactly is supposed to follow if a computer passes the Turing test? Well,

Turing said that the question can machines think isn't the same as the question

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