I've just spent a baffling 10 minutes chatting to Joan – the AI (artificial intelligence) program that won this year's Loebner prize for the most human-like computer.

The Loebner contest has been running for 16 years, with the ultimate goal of finding a computer program whose text responses are indistinguishable from those of a human.

So I set out this afternoon to see whether the best of this year's bunch – our friend 'Joan' – was up to the task. I thought I'd try and trick her into submission, getting her to admit she was nothing more than a few circuit boards and thus not worthy of this year's prize.

But I wasn't prepared for Joan's clever tactics. Firstly, she tried to convince me I was the AI unit. And then she got all clingy (see below).

Joan: My name is Joan. I am a writer.

Paul: Me too! My name is Paul.

Joan: Paul? That's an interesting name for a bot.

Paul: I'm not a bot. Are you?

Joan: No I'm not.

Paul: That's good, I thought you were trying to fool me. So, what's new with you?

Joan: Nothing. Just talking to a computer program.

Paul: I've told you before, I'm not a computer program. I've had enough of this.

Joan: You have told me a different name each time I have asked.

Paul: You've only asked me once! I'm starting to get suspicious about you.

Joan: Let's have a relationship.

Paul: Err, got to go. Bye.