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CAP theorem is simple if we all use the same definitions. CAP follows from the requirements for nodes in distributed systems to send and receive messages before responding if the system requires atomic...

CAP theorem is simple if we all use the same definitions. CAP follows from the requirements for nodes in distributed systems to send and receive messages before responding if the system requires atomic consistency. If the system can't pass messages, it can't be consistent. If consistency is a requirement, then losing messages implies the system cannot respond.

These properties apply to any distributed systems.