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Billiard balls

Determinism is the philosophical proposition that every event, including human cognition and action, is causally determined by an unbroken chain of prior occurrences. No wholly random, spontaneous, mysterious, or miraculous events occur, according to this philosophy.

The idea that the entire universe is a deterministic system has been articulated in both Western and non-Western religion, philosophy, and literature. Determinism in the West is often associated with Newtonian physics, which depicts the physical matter of the universe as operating according to a set of fixed, knowable laws. The "billiard ball" hypothesis, a product of Newtonian physics, argues that once the initial conditions of the universe have been established the rest of the history of the universe follows inevitably.