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tokens: ACKNOWLEDGEMENTS We are very grateful to Alberto Bolatto and Tony Wong for providing us with a compilation of H i masses that they made for galaxies from the EDGE-CALIFA survey (see the references listed in item ii of Section 3 ), and to Ed Elson for providing us with measurements of mass and specific angular momentum that he made for galaxies from the WHISP survey (Elson 2017 ). In addition, we are very grateful to Oscar Agertz, Alberto Bolatto, Françoise Combes, John Forbes, Mark Krumholz, Claudia Lagos, Lorenzo Posti, and Florent Renaud for useful discussions. We are also very grateful to an anonymous referee for insightful comments and suggestions, for further constructive criticism, and for encouraging future work on the topic.