 Lewis's triviality result

Lewis's triviality result, primarily associated with philosopher David Lewis, pertains to the topic of modal realism and the nature of possible worlds. In particular, it addresses the challenges of modal discourse—how we talk about what is possible, necessary, or contingent—and offers insights into the interpretation of these modalities. The result can be characterized as follows: 1. **Modal Realism**: Lewis argued for a form of modal realism, which posits that all possible worlds are as real as the actual world.