People invent new machines and improve existing ones almost unconsciously, rather as a Somnambulist will go walking in his sleep. The interesting puzzle in our times is that we so willingly sleepwalk through the process of reconstituting the conditions of human existence.

The fact that a task cannot be computerized does not imply that computerization has no effect on that task. On the contrary, tasks that cannot be substituted by computerization are generally complemented by it. This point is as fundamental as it is overlooked.

In our age of individualism, we see computers as ways through which we can express our individuality. But the truth is that the computers are really good at spotting the very opposite. The computers can see how similar we are, and they then have the ability to agglomerate us together into groups that have the same behaviours.

Quite a lot has been written, including by me, about the effect of social media on politics, and in particular the way in which the algorithms built into Facebook and YouTube are more likely to spread angry, extremist and deliberately provocative political language.

Error-prone or biased artificial-intelligence systems have the potential to taint our social ecosystem in ways that are initially hard to detect, harmful in the long term, and expensive - or even impossible - to reverse.

Ultimately, our ideas about robots are not about robots. The robot is a canvas onto which we project our hopes and our dreams and our fears... they become embodiments of those hopes and dreams and fears.