To be frank, we're not vacuum experts, but we're probably coming at this from the same angle as the general consumer.

ENGADGET: Dyson DC23 Turbinehead impressions Hands-on

Police retort that politicians were peripheral to their main investigation, and that they told the attorney-general, Roberto Gurgel, about the political angle three years ago.

ECONOMIST: Corruption in Brazil

However, the idea that general-purpose robots, capable of learning, will become widespread is wrong, suggests Mr Angle.

ECONOMIST: Robotics