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  2. The unanswerable questions - Wikipedia

    en.wikipedia.org/wiki/The_unanswerable_questions

    The Cula-Malunkyovada Sutta, MN 63 [9] and 72 [10] contains a list of ten unanswered questions about certain views (ditthi): The world is eternal. The world is not eternal. The world is (spatially) infinite. The world is not (spatially) infinite. The being imbued with a life force is identical with the body.

  3. List of unsolved problems in biology - Wikipedia

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

    Glycogen body. The function of this structure in the spinal cord of birds is not known. Arthropod head problem. A long-standing zoological dispute concerning the segmental composition of the heads of the various arthropod groups, and how they are evolutionarily related to each other. Ovaries of basking sharks.

  4. Lists of unsolved problems - Wikipedia

    en.wikipedia.org/wiki/Lists_of_unsolved_problems

    Natural sciences, engineering and medicine. Unsolved problems in astronomy. Unsolved problems in biology. Unsolved problems in chemistry. Unsolved problems in geoscience. Unsolved problems in medicine. Unsolved problems in neuroscience. Unsolved problems in physics.

  5. List of unsolved problems in physics - Wikipedia

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

    The following is a list of notable unsolved problems grouped into broad areas of physics. [ 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 ...

  6. List of philosophical problems - Wikipedia

    en.wikipedia.org/wiki/List_of_philosophical_problems

    The hard problem of consciousness is the question of what consciousness is and why we have consciousness as opposed to being philosophical zombies. The adjective "hard" is to contrast with the "easy" consciousness problems, which seek to explain the mechanisms of consciousness ("why" versus "how", or final cause versus efficient cause ).

  7. List of unsolved problems in astronomy - Wikipedia

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

    This article is a list of notable unsolved problems in astronomy. Problems may be theoretical or experimental. Theoretical problems result from inability of current theories to explain observed phenomena or experimental results. Experimental problems result from inability to test or investigate a proposed theory.

  8. List of unsolved problems in chemistry - Wikipedia

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

    List of thermal conductivities. List of undecidable problems. List of unsolved deaths. List of unsolved problems in astronomy. List of unsolved problems in biology. List of unsolved problems in computer science. List of unsolved problems in economics. List of unsolved problems in fair division. List of unsolved problems in geoscience.

  9. List of unsolved problems in neuroscience - Wikipedia

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

    List of unsolved problems in neuroscience. The following is a list of notable unsolved problems in neuroscience. A problem is considered unsolved if no answer is known or if there is significant disagreement among experts about a proposed solution.