
The humans quickly made themselves known by answering simple questions about the weather or surroundings, which the bots either ignored or got hopelessly wrong. One bot began with the novel strategy of bribing me to split the prize money if I declared it human, while another claimed to be an alien on a spaceship. In practice I needed just minutes to tell human from machine.

The judges have 25 minutes to figure out which is which, before moving on to another human/AI pair.

With the Loebner prize, four human judges each sit at a computer and carry out two text-based conversations at the same time – one with a real person hidden in a separate room, the other with a chatbot.
