||Foundational work on underdetermination concerning empirically equivalent theories includes Laudan & Leplin 1991 as well as Kukla 1996. Important papers concerning the Quine-Duhem Thesis, which is interested in underdetermination related to confirmational holism, begin with Duhem 1954 and Quine 1953 with an influential response provided by Laudan 1990. See Longino 1990 for a defense of the pervasiveness of this form of underdetermination. Transient Underdetermination, underdetermination related to the appearance of new theories throughout the history of science, has been of significant recent interest, with Stanford 2001 reviving discussions of the problem of unconceived alternatives brought up by Sklar 1975. For straightforward discussion of more minimal underdetermination faced in the day-to-day practice of science brought about by the limits of our presently available evidence, see Biddle 2013 and Turner 2005.