"no free lunch theorem" meaning in English

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        "2": "there's no such thing as a free lunch"
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      "expansion": "there's no such thing as a free lunch",
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  "etymology_text": "Derives from the phrase there's no such thing as a free lunch.",
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  "lang_code": "en",
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        "A theorem that implies that no single machine learning algorithm is universally the best-performing algorithm for all problems."
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          "universally"
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        "(artificial intelligence, computing) A theorem that implies that no single machine learning algorithm is universally the best-performing algorithm for all problems."
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        "computing",
        "engineering",
        "mathematics",
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        "physical-sciences",
        "sciences"
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  "word": "no free lunch theorem"
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  ],
  "etymology_text": "Derives from the phrase there's no such thing as a free lunch.",
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        "A theorem that implies that no single machine learning algorithm is universally the best-performing algorithm for all problems."
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        "(artificial intelligence, computing) A theorem that implies that no single machine learning algorithm is universally the best-performing algorithm for all problems."
      ],
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