- Identical with(used to ask whether a playwright in an alternate scenario is actually Russell)
- Being the exact same person or thing, not just similar—in philosophy, this raises the question of what makes someone 'the same person' across different scenarios.
- Instantiating(as used in logic and philosophy of mathematics)
- Actually creating or making real a specific example of something—like writing down the number 5 on a piece of paper is instantiating the abstract concept of five.
- Mereology
- The study of the relations between parts and wholes
- different descriptions(as used in philosophy of language)
- Different ways of talking about or referring to the same thing using different words or concepts.
- divine essence(Mersenne's Second Objections to Descartes)
- A genuine, coherent nature or essence corresponding to the concept of God, whose reality is a precondition for ontological arguments
- entails(describes a logical relationship between statements)
- Logically forces or guarantees; if A entails B, then whenever A is true, B must also be true.
- inhering in a subject(as used in metaphysics)
- Existing as a quality that belongs to and depends on some object or thing (the subject).
- mereological commitment(as used in metaphysics)
- Taking on the burden of explaining how multiple parts or pieces fit together into a single whole.
- properties(Contrasted with substances as ontologically dependent entities.)
- Entities that depend for their existence on substances, being properties of individual objects.