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The authorities recognised that national security ears were perhaps not as feasible as they had originally thought. Although several other surveillance schemes were launched in Scarfolk in the 1970s (see, for example, thought-detector vans, telekinetic child-owls, I-Spy books and Living-Eye surveillance computers), GCHQ realised that the most productive way to surveil a nation is for the citizens to unwittingly collate all their own personal data, verbal or otherwise, and transmit it directly to the government. In essence, citizens spying on and betraying themselves. Unfortunately, this idea would be not become workable on an industrial scale until the age of the internet.