 It is not built into the formulation of Existence monism that the one concretum has any particular nature. It might be my nose or your left foot. It might be material (realist) or mental (idealist) or neutral. Idealist and neutral forms of existence monism may or may not identify the One with some sort of divinity. Materialist and neutral forms of existence monism typically identify the One with the whole cosmos (Horgan and Potrč’s “blobject”). Using ‘\(u\)’ as a dedicated constant for the cosmos, which may be defined mereologically as the sum of all concreta, one thus reaches: