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Journal Article Voluntary and Involuntary Get access Frederick Adrian Siegler Frederick Adrian Siegler University of Washington Search for other works by this author on: Oxford Academic PubMed Google Scholar The Monist, Volume 52, Issue 2, 1 April 1968, Pages 268–287, https://doi.org/10.5840/monist196852218 Published: 23 December 2014
Frederick A. Siegler (Mon,) studied this question.