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  1. Realism, Underdetermination and String Theory Dualities.Keizo Matsubara - 2013 - Synthese 190 (3):471-489.
    String theory promises to be able to provide us with a working theory of quantum gravity and a unified description of all fundamental forces. In string theory there are so called ‘dualities’; i.e. different theoretical formulations that are physically equivalent. In this article these dualities are investigated from a philosophical point of view. Semantic and epistemic questions relating to the problem of underdetermination of theories by data and the debate on realism concerning scientific theories are discussed. Depending on ones views (...)
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    Quantum Gravity and the Nature of Space and Time.Keizo Matsubara - 2017 - Philosophy Compass 12 (3):e12405.
    This is a nontechnical overview of how various approaches to quantum gravity suggest modifications to the way we conceptualize space and time. A theory of quantum gravity is needed to reconcile quantum physics with general relativity, our best theory for gravity. The most popular approaches to quantum gravity are string theory and loop quantum gravity. So far, no approach has been empirically successful, and there is no commonly accepted theory. Thus, the conclusions presented here are tentative. Many approaches suggest that (...)
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  3. String Theory and General Methodology: A Mutual Evaluation.Lars-göran Johansson & Keizo Matsubara - 2011 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 42 (3):199-210.
    String theory has been the dominating research field in theoretical physics during the last decades. Despite the considerable time elapse, no new testable predictions have been derived by string theorists and it is understandable that doubts have been voiced. Some people have argued that it is time to give up since testability is wanting. But the majority has not been convinced and they continue to believe that string theory is the right way to go. This situation is interesting for philosophy (...)
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    A Defence of String Theory. [REVIEW]Keizo Matsubara - 2015 - Metascience 24 (2):189-194.
    String theory has been very influential within theoretical physics for the past few decades. It is the most popular attempt to solve the problem of formulating a viable theory of quantum gravity. Furthermore, it also unifies the other fundamental forces within one theoretical framework. In string theory, it is assumed that what before was thought to be point particles should really be seen as one-dimensional extended entities, i.e. strings. Different particles are supposed to correspond to various vibrational patterns of the (...)
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