 A second concern is that the presupposition that all properties are ultimately maximally determinate violates certain possible and potentially actual conceptions of natural reality. For example, if objects fill space, and space is both continuous and gunky (i.e., such that every entity has proper parts), then the shapes and locations of objects will be indefinitely subject to further determination (see Salmieri 2008: 78,  n47).[26]  And certain interpretations of quantum mechanics  (see §5.3  for further discussion) and certain field-theoretic understandings of fundamental particles as having infinitely extensible boundaries (reflecting these particles’ being constituted by long-range interactions) suggest that natural reality is to some extent irreducibly determinable.