Not to be confused with Tautology. Stumbled upon this while looking at this wikipedia page on Tautology. Stumbled upon this while looking at this wikipedia page on Semantic Analysis

Metaphysics

Ontology

Ontology is the philosophical study of being, as well as related concepts such as existence, becoming, and reality. Ontology addresses questions of how entities are grouped into categories and which of these entities exist on the most fundamental level.