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Journal Article On the Nature of Certain Philosophical Entities Get access Richard Montague Richard Montague The University of California, Los Angeles Search for other works by this author on: Oxford Academic PubMed Google Scholar The Monist, Volume 53, Issue 2, 1 April 1969, Pages 159–194, https://doi.org/10.5840/monist19695327 Published: 22 December 2014
Richard Montague (Wed,) studied this question.