Artificial intelligence
When a top-level function is entered, the LISP processor do(es)

All of these
It prints the results returned by the function.
It evaluates the function and the function's operands
None of these
It reads the function entered

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Artificial intelligence
What is a heuristic function?

A function to solve mathematical problems
A function which takes parameters of type string and returns an integer value
A function whose return type is nothing
A function that maps from problem state descriptions to measures of desirability

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