Discussion
What does a utility based agent add to a goal based one?
Answer: A
A goal is binary, achieved or not, whereas a utility function ranks outcomes, allowing the agent to trade speed against safety or cost against quality, and to act sensibly when goals conflict or are uncertain. Multiple goals and models are handled by both, and learning is an orthogonal addition. Replacing a predicate with a number is a small change that greatly enlarges the range of situations an agent can handle sensibly.
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