nfr0

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<a href="https://en.wikipedia.org/wiki/Two_Generals%27_Problem">https://en.wikipedia.org/wiki/Two_Generals%27_Problem</a>

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<a href="https://en.wikipedia.org/wiki/Allegory_of_the_Cave">https://en.wikipedia.org/wiki/Allegory_of_the_Cave</a>

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