Marconi's conception of the radio was as a substitute for the telephone, a tool for private conversation; instead, it is precisely the opposite, a tool for communicating with a large, public audience.
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AMarconi's conception of the radio was as a substitute for the telephone, a tool for private conversation; instead, it is
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BMarconi conceived of the radio as a substitute for the telephone, a tool for private conversation, but which is
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CMarconi conceived of the radio as a tool for private conversation that could substitute for the telephone; instead, it has become
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DMarconi conceived of the radio to be a tool for private conversation, a substitute for the telephone, which has become
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EMarconi conceived of the radio to be a substitute for the telephone, a tool for private conversation, other than what it is,
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