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"We are blending complex systems that had never interacted together before with the expectation that they collaborate forming a single, larger system."

I suggest more people read the first few chapters of Specifying Systems by Lamport. Maybe the rest is good also, but that's as far as I got.

It works through a trivial system (display clock) and combines it with another trivial system (display weather).

Nothing Earth-shattering, but it really stuck with me. Thinking about it at that level gave me a new appreciation for what combining two systems means.

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