2000 Paper 9 Question 9
Artificial Intelligence
Consider the following story of the play Macbeth, by William Shakespeare:
The characters are Macbeth, Lady-Macbeth, Duncan and Macduff.
Macbeth is an evil noble. Lady-Macbeth is a greedy ambitious woman.
Duncan is a king. Macduff is a loyal noble. Macbeth is weak because
Macbeth married Lady-Macbeth and because Lady-Macbeth is greedy.
Lady-Macbeth persuades Macbeth to want to be king. Macbeth murders
Duncan using a knife because Macbeth wants to be king and because
Macbeth is evil. Lady-Macbeth kills Lady-Macbeth. Macduff is angry
because Macbeth murdered Duncan and because Macduff is loyal to
Duncan. Macduff kills Macbeth.
Construct a semantic network representing the above story. [8 marks]
Show the chain of reasoning leading to Macduff killing Macbeth. [5 marks]
It is possible to change the story so that Lady-Macbeth is unable to persuade
Macbeth to want to be king. Augment the story to provide a reason for
Lady-Macbeth’s inability to persuade Macbeth to want to be king. Update the
semantic network to reflect the new situation. [7 marks]