"life/dinner principle" meaning in English

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  "lang_code": "en",
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          "ref": "2006, Richard Dawkins, The Selfish Gene, 30th anniversary edition, page 250:",
          "text": "My colleague John Krebs and I have dubbed this the ‘life/dinner principle’. Because of the life/dinner principle, animals might at times behave in ways that are not in their own best interests, manipulated by some other animal.",
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        "Alternative form of life-dinner principle"
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      "id": "en-life/dinner_principle-en-noun-xXSy8NJ2",
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  "word": "life/dinner principle"
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