Today none of the old assertions are accepted any longer just because they were written long ago. Instead, people demand proof in practice of what is… - Ernesto Che Guevara

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Today none of the old assertions are accepted any longer just because they were written long ago. Instead, people demand proof in practice of what is asserted; they want a scientific analysis of all assertions. Out of this dissatisfaction, revolutionary ideas are born and spread more and more throughout the world, backed by the living examples of how technology can be put at the service of man, as has happened in the socialist countries.