Ideas from 'Events' by David Lewis [1986], by Theme Structure

[found in 'Philosophical Papers Vol.2' by Lewis,David [OUP 1986,0-19-503646-8]].

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7. Existence / B. Change in Existence / 4. Events / a. Nature of events
The events that suit semantics may not be the events that suit causation
Events are classes, and so there is a mereology of their parts
Some events involve no change; they must, because causal histories involve unchanges
Events have inbuilt essences, as necessary conditions for their occurrence
7. Existence / B. Change in Existence / 4. Events / c. Reduction of events
An event is a property of a unique space-time region
8. Modes of Existence / B. Properties / 10. Properties as Predicates
Properties are very abundant (unlike universals), and are used for semantics and higher-order variables
26. Natural Theory / C. Causation / 1. Causation / a. Causation
Causation is a general relation derived from instances of causal dependence