postulate

中文： 公设

1. Something assumed without proof as being self-evident or generally accepted, especially when used as a basis for an argument. Sometimes distinguished from axioms as being relevant to a particular science or context, rather than universally true, and following from other axioms rather than being an absolute assumption.
2. A fundamental element; a basic principle.
3. An axiom.
4. A requirement; a prerequisite.

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