I have had mcluhan tetrads in the back of my mind lately (example)pic.twitter.com/PwXXmmXwea
the most interesting ones are "what does it (new tech) make obsolete?" and "how does it reverse?" and the latter means
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that pushed to its limits, tech tends to break down and "reverse" in a mysterious (to me) way
Thanks. Twitter will use this to make your timeline better. UndoUndo
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