"It's just human nature that patients want to please doctors, " says Kevin R.

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Human nature just wants to keep adding to the tab.

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We've just seen the best of human nature.

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And when I look back at my own tenure as the CEO of my own company, I realize that most of the skills that made me successful in product development, marketing, management, or just collecting our receivables were just footnotes to that crash course in human nature that I got from sales.

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And I think we just have to recognize that this is a really unchanging quality of human nature.

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Dressed in a thin putty-colored sweater, jeans and trendy black slip-on sneakers with white bottoms, Mr. Robinson had just returned from the Venetian Las Vegas, where he is presenting Human Nature, an Australian vocal group that performs Motown hits.

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The fundamental element of human nature and corporate decision-making on ship safety is just as relevant today as it was 100 years ago.

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