  Sistology, which is only sketched by Sylvan, nevertheless anticipates some of the ideas currently debated among neo-Meinongians, for example, as discussed above, with “items in general”. Regardless of the existence or non-existence of these items, sistology concerns their “having standing” (1991, 839). In so doing, Sylvan focuses his attention on one of the most under-researched notions of Meinong’s theory of objects, that is, the so-called doctrine of Outsidebeing [Aussersein]. Only recently have neo-Meinongian started to turn their attention to this topic (Casati and Priest 2017; Grossman 1974; Jacquette 2015). So too with the very particular kind of object that is “nothingness” (cf. Sylvan 1995a). After a long-standing lack of interest in these topics, neo-Meinongians have begun to take them into serious consideration as well (Casati and Fujikawa 2019; Priest 2014a and 2014b; Jacquette 2013).