Question: 2.9 Consider the program in Figure 2.10 and simulate, in the style of Figure 2.10, Prolog's execution of the question: ?- big(X), dark(X). Compare your

2.9 Consider the program in Figure 2.10 and simulate, in the style of Figure 2.10, Prolog's execution of the question: ?- big(X), dark(X). Compare your execution trace with that of Figure 2.10 when the question was essentially the same, but with the goals in the order: ?- dark(X), big(X). In which of the two cases Prolog does more work before the answer is found?

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