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Solution to part (b)

Give one interpretation that is not a model of KB.

Both clauses of KB are false in the following interpretation:

D = {x,y}

phi(a) = x, phi(b)=x, phi(c)=x.

pi(p)(<x>)=TRUE. pi(p)(<y>)=FALSE.

pi(q)(<x>)=FALSE. pi(q)(<y>)=TRUE.

Computational Intelligence online material, ©David Poole, Alan Mackworth and Randy Goebel, 1998

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