Robots are getting smarter all the time, and are now able to perform highly complex activities, yet there are still large numbers of tasks which are second nature to humans but leave robots largely stumped. For example, we are able to recognise someone we know in a large crowd, even if they are wearing sunglasses and a hat. In contrast robots would simply be unable to carry out this task, as they are ill equipped to handle unpredictable situations where they do not have full knowledge.
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