Excerpt
Here is an extract from a famous demonstration of SHRDLU (with messages converted from their original upper case for ease of reading):
- Person: Pick up a big red block.
- Computer: OK.
- Person: Grasp the pyramid.
- Computer: I don't understand which pyramid you mean.
- Person (changing their mind): Find a block which is taller than the one you are holding and put it into the box.
- Computer: By "it", I assume you mean the block which is taller than the one I am holding.
- Computer: OK.
- Person: What does the box contain?
- Computer: The blue pyramid and the blue block.
- Person: What is the pyramid supported by?
- Computer: The box.
- Person: How many blocks are not in the box?
- Computer: Four of them.
- Person: Is at least one of them narrower than the one which I told you to pick up?
- Computer: Yes, the red cube.
- etc.
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