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I'm having a hard time getting the program in Figure 13.13 to run correctly. I have included the clauses on page 305. When I run
andor(a, Solution).
I get an error saying:
ERROR: evaluate/2: Undefined procedure: h/2
Is there an error in the code? In procedure evaluate there is a call to h(Node, H). Shouldn't this rather be f(Node, H)? I try this but when I run the above command I get "no" as a result.