“Computer systems are, like many other things in engineering, constructed by
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“Computer systems are, like many other things in engineering, constructed by
composition,” computer researchers F.X. Lindner and Sandro Gaycken have written.
That line, intended for switched-on digital systems, in fact fits most of our world.
Nearly everything around us, from cities to telephone networks to refugee waves,
are assembled by composition. Curriences are layered with encryption. Refugee
dreams carved from photosharing and refined with GPS. Composition in this way
breeds new vulnerabilities, new points of contact and this rather astonishing result,
one we're not prepared for in any sense: “In a composite system there is no critical
gate,” Lindner and Gaycken explain. “Everything is a gate.”299
239 “Everything is a gate”: Lidner and Gaycken, p. 56
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