Determinism is the philosophical view that all events are determined completely by previously existing causes. Deterministic theories throughout the history of philosophy have sprung from diverse and sometimes overlapping motives and considerations. The opposite of determinism is some kind of indeterminism (otherwise called nondeterminism) or randomness. Determinism is often contrasted with free will, although some philosophers claim that the two are compatible.
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Determinism often is taken to mean causal determinism, which in physics is known as cause-and-effect. It is the concept that events within a given paradigm are bound by causality in such a way that any state (of an object or event) is completely determined by prior states. This meaning can be distinguished from other varieties of determinism mentioned below.
Other debates often concern the scope of determined systems, with some maintaining that the entire universe is a single determinate system and others identifying other more limited determinate systems (or multiverse). Numerous historical debates involve many philosophical positions and varieties of determinism. They include debates concerning determinism and free will, technically denoted as compatibilistic (allowing the two to coexist) and incompatibilistic (denying their coexistence is a possibility).
Determinism should not be confused with self-determination of human actions by reasons, motives, and desires. Determinism is about interactions which affect our cognitive processes in our life. It is about the cause and the result of what we have done in our life. Cause and result are always bounded together in our cognitive processes. It assumes that if an observer has sufficient information about an object or human being, that such an observer might be able to predict every consequent move of that object or human being. Determinism rarely requires that perfect prediction be practically possible.