Philosophy
Causation and Counterfactual Theories of Explanation
Quick fact
David Lewis's counterfactual theory formalizes the idea that a cause is a difference-maker: if the cause had not occurred, the effect would not have occurred, a concept that underpins many modern causal inference methods in statistics and AI.
Why this is interesting
You've probably said 'because' a thousand times without thinking—but what makes an explanation truly satisfying? Why does 'the glass broke because it was dropped' feel more complete than 'the glass broke because the floor was there'?