The Moravec's paradox is the counter intuitive discovery by artificial intelligence researchers that advanced reasoning requires very little computational power, but basic sensory-motor skills are incredibly computationally complex. Activities considered complex by human standards, such as calculating statistics and playing chess are very easily accomplished by artificial intelligences. However, extremely basic activities, such as recognising faces or walking up a set of stairs requires vast computational resources, and can only be accomplished by the most advanced artificial intelligences. Although futurists predict a supersession of human workers by artificial intelligences, Moravec's paradox implies that advanced professions will be usurped first, not the simple or routine occupations, as commonly featured in science fiction.