as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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explain the following sentence: the man had a one-track mind.
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the phrase "one-track mind" implies a tendency to focus on a single issue without considering any alternatives, hinting that the man was single-minded and had a narrow field of view.
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