 Some of the following attempts to analyse intrinsicality are best seen as attempts to analyse the distinction between duplication preserving and duplication non-preserving properties, while others are best seen as attempts to analyse the distinction between interior and exterior properties, or between local and non-local properties. (For a more detailed discussion of a number of the attempted analyses below, see Hoffmann-Kolss 2010a, Marshall 2012, and Marshall 2013. For a discussion of whether we need an analysis of intrinsicality, see Skiles 2014.)