- David Hume(as referenced in the statement)
- An 18th-century Scottish philosopher who argued that our desires and emotions, not reason alone, drive our actions and decisions.
- Enquiry VII(the source where Hume presents this theory)
- A section (Part VII) of Hume's book *An Enquiry Concerning Human Understanding*, where he discusses causation.
- Metaphysical relation(as used in metaphysics)
- A deep, fundamental connection between things that goes beyond just one event causing another—it's about how things are connected in their basic nature.
- Psychological projection(describing where Hume believes our sense of causation comes from)
- When our mind creates or imposes something onto the world that isn't actually there—we're projecting our own thoughts or expectations onto reality.
- Regularity theory of causation(as the main subject of the statement)
- A theory saying that one thing causes another simply because whenever the first thing happens, the second thing regularly follows it—there's no deeper 'power' making it happen, just a reliable pattern.
- causation(Lewis's counterfactual theory of causation)
- Event C causes event E if and only if there exists a chain C, D1, …, Dn, E such that each member (except C) is counterfactually dependent on the preceding event; causation is the ancestral of counterfactual dependence
- necessary connection(Hume's account of the origin of the concept of causation, Treatise I.III.14)
- The felt sense of the mind being pulled from one impression to an associated idea, which the mind then projects onto external objects as if it were a connection among the objects themselves