When will artificial intelligence be capable of providing intelligent conversation? Jane Wakefield looks at two AI systems that still fall well short in the so-called Turing Test of passing themselves off as human.

Amazon's virtual assistant Alexa may be capable of ordering your groceries or even cracking a joke, but shockingly she has never heard of Business Daily. Despite this clear evidence of limited intelligence, head scientist Rohit Prasad insists that his baby has smarts.

Meanwhile a more glamorous build-you-own-buddy is Sophia (pictured), the android capable of 60 facial expressions, which apparently was enough to earn her Saudi citizenship. But is she more than just a pretty latex face? Jane speaks to her creator and biggest fan, David Hanson.

(Picture: The humanoid robot Sophia, which was granted citizenship in Saudi Arabia; Credit: Pavlo Conchar/SOPA Images/LightRocket via Getty Images)