“…As a consequence, decoherence is relative to the relevant observables selected to be studied (Castagnino, Fortin, and Lombardi 2010b, Dugić and Jeknić-Dugić 2012, Lychkovskiy 2013). In turn, since there is no privileged or essential decomposition of the closed system (Harshmann and Wickramasekara 2007a, 2007b, Harshman 2019, there is no need for an unequivocal criterion to identify the systems involved in decoherence (for a detailed discussion, see Lombardi, Fortin, and Castagnino 2012).…”