She must not. The candidate's change of heart is frustrating but not unethical. Her duty was to inform you promptly of any significant change in her thinking about the job, and that's what she did. A job search is fraught with uncertainty on both sides. As the two parties move through the process, their feelings often fluctuate. And as Dr. Johnson did not say, "Depend upon it, sir, when a man knows he is to schlep to the airport in a fortnight, it concentrates his mind wonderfully."

You would have a legitimate beef if she had unalterably decided against the job but took the trip anyway -- to revel in the Beaver Dam high life, perhaps -- but you do not suggest that that was the case. Under the circumstances, you cannot know what she felt, more an epistemological problem than an ethical one, and so you should make the more charitable assumption that she acted, if not promptly, then at least in good faith.

(Readers can direct their questions and comments by e-mail to ethicist@nytimes.com. This column originates in The New York Times Magazine.)

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