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Journal Article Wittgenstein and the Four-Fold Root of the Principle of Sufficient Reason Get access A. Phillips Griffiths A. Phillips Griffiths Search for other works by this author on: Oxford Academic Google Scholar Aristotelian Society Supplementary Volume, Volume 50, Issue 1, 11 July 1976, Pages 1–20, https://doi.org/10.1093/aristoteliansupp/50.1.1 Published: 30 July 2015
A. Phillips Griffiths (Sun,) studied this question.