The program would plan out a sequence of actions and in the virtual world the robot arm would arrange the blocks appropriately. SHRDLU would respond to commands typed in natural English, such as "Will you please stack up both of the red blocks and either a green cube or a pyramid".
SHRDLU controlled a robot arm that operated above a flat surface strewn with play blocks (both the arm and the blocks were virtual). Much research has focussed on the so-called blocks world, which consists of coloured blocks of various shapes and sizes arrayed on a flat surface.Īn early success of the micro-world approach was SHRDLU, written by Terry Winograd of MIT (details of the program were published in 1972). In 1970 Marvin Minsky and Seymour Papert, of the MIT AI Laboratory, proposed that AI research should likewise focus on developing programs capable of intelligent behaviour in artificially simple situations known as micro-worlds.
The real world is full of distracting and obscuring detail: generally science progresses by focussing on artificially simple models of reality (in physics, frictionless planes and perfectly rigid bodies, for example).
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