Artificial intelligence
What is a heuristic function?

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

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Artificial intelligence
An algorithm A is admissible if ___________

It is guaranteed to return an optimal solution when one exists
It returns more solutions, but not an optimal one
It is not guaranteed to return an optimal solution when one exists
It guarantees to return more optimal solutions

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