  The metaphysical details of such a picture matter. Otherwise, “immanence”, “nothing over and above”, and the like will turn into mere labels for that psychophysical relation, we know not what, that solves the Exclusion Problem. Accordingly, several promising lines of inquiry have been pursued. Mental and physical properties are said to be related by, for example, the determinable–determinate relation (Yablo 1992; critics include Ehring 1996; Worley 1997; Funkhouser 2006), constitution (Pereboom 2002; critics include Ney 2007; Heil 2011), metaphysical necessitation (Bennett 2003, 2008), physical explicability (Antony 1991), physical implementation (Marras 2003), and grounding (Kroedel and Schulz 2016).