 While we don’t have the space to explore these proposals here, some have proposed not just essence-to-grounding or grounding-to-essence principles but full-blown accounts of essence in terms of grounding or vice versa. deRosset (2013) and Gorman (2014) propose accounts of essence in terms of grounding. (See Zylstra 2018 for critical discussion.) Correia (2013) and Zylstra (2019a) instead propose accounts of grounding in terms of essence. Finally, some have proposed accounts of both essence and grounding in terms of some third item—Fine (2015) does so in terms of constitutively necessary and sufficient conditions, and Correia and Skiles (2019) in terms of generalized identity. (See Zylstra 2020 for critical discussion of each of the above accounts.)