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  2. Ignoramus et ignorabimus - Wikipedia

    en.wikipedia.org/wiki/Ignoramus_et_ignorabimus

    Emil du Bois-Reymond first used the words "ignoramus" and "ignorabimus" at the close of his keynote address to the 1872 Congress of German Scientists and Physicians. As he saw it, science was bounded by two limits: the ultimate nature of matter and the enigma of consciousness.

  3. List of unsolved problems in economics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    At present, there is no explanation widely accepted by economists. [8] [9] [10] The Modigliani–Miller theorem suggests that the puzzle can (only) be explained by some combination of taxes, bankruptcy costs, market inefficiency (including that due to investor psychology), and asymmetric information.

  4. Extraordinary claims require extraordinary evidence - Wikipedia

    en.wikipedia.org/wiki/Extraordinary_claims...

    "Extraordinary claims require extraordinary evidence" (sometimes shortened to ECREE), [1] also known as the Sagan standard, is an aphorism popularized by science communicator Carl Sagan. He used the phrase in his 1979 book Broca's Brain and the 1980 television program Cosmos .

  5. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

  6. List of unsolved problems in physics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    [1] Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result. The others are experimental, meaning that there is a difficulty in creating an experiment to test a proposed theory or investigate a phenomenon in greater detail.

  7. E. L. Grant Watson - Wikipedia

    en.wikipedia.org/wiki/E._L._Grant_Watson

    Elliot Lovegood Grant Watson (14 June 1885 – 21 May 1970) was a writer and biologist. [1] Among some 40 books and many essays and short stories he wrote six 'Australian' novels and several scientific-philosophical works that challenge Darwinism, or the mechanism of evolutionary theory, as an entire explanation for the development of life on earth.

  8. Publius Enigma - Wikipedia

    en.wikipedia.org/wiki/Publius_Enigma

    During the 1994 Division Bell World Tour, Columbia Records flew a 194-foot-long (59 m) airship named The Division Belle between Pink Floyd concert locations. [3] [4] The Columbia Electronic Press Kit was released to the media, along with the Promo Spots Video consisting of interviews with band members, footage of the airship in action, and a segment which contained the following: [citation needed]

  9. Painted enigma - Wikipedia

    en.wikipedia.org/wiki/Painted_enigma

    The emblem and painted enigma were similar in that each usually contained some clue that the composition contained a hidden meaning, usually a "written legend which might be a verbal riddle or rebus to be solved by the same word, or a simple epigrammatic motto such as constituted the 'soul' of the emblem."