유조선 운항이 급감한 배경에는 군사적 긴장뿐 아니라 보험 비용 상승도 있다.
Associativity: when merging three (or more) states, it doesn’t matter which are merged first; (A ∨ B) ∨ C = A ∨ (B ∨ C). If Alice receives states from both Bob and Carol, she can merge them into her own state in any order and the result will be the same.4
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