Detects existence and presence of entities and states.

What it is

Boolean.Presence elements encode existential claims — whether something exists, is present, or is occurring. They cover both explicit and implicit existence constructions. They are distinct from Identity elements: Presence concerns whether something exists, while Identity concerns what it is.

Element 4 of 56 — the Boolean type, as set out in DOI 10.5281/zenodo.19852341.