- Arnauld(as a historical figure in metaphysics)
- Antoine Arnauld was a 17th-century French philosopher and theologian who thought deeply about logic and how ideas relate to reality.
- asymmetric(as used in logic and epistemology)
- When two things are treated differently or unequally, rather than being balanced or fair—like giving one side of an argument more weight than the other.
- causal requirement(logical relationship being discussed)
- A principle stating that something must have a cause, and there are specific rules about what kinds of causes can produce what kinds of effects.
- formal reality(Used in Descartes' causal principle in Meditation III)
- The degree of reality a thing possesses in itself, as an actually existing entity
- idea(Hume's usage, narrower than Locke's and Descartes' use of 'ideas' to cover all immediate objects of consciousness)
- A copy or subsequently recalled perception, derived from an original impression
- objective reality(Contrasted with formal reality in Descartes' causal principle in Meditation III)
- The degree of reality belonging to the object or content represented by an idea, as it exists within the idea
- perception(Hume's theory of ideas)
- Any mental activity that brings something before the mind; the basic unit of mental life in Hume's theory of ideas.
- proportionally greater(describing the relationship between cause and effect)
- An increase that matches or corresponds to another increase—so if one thing doubles, the other should also double in a matching way.