If the intellect becomes, not only the producer, but also a product of technology, then a feedback cycle with unpredictable and potentially explosive consequences can result. For when the thing being engineered is intelligence itself, the very thing doing the engineering, it can set to work improving itself. Before long, according to the singularity hypothesis, the ordinary human is removed from the loop, overtaken by artificially intelligent machines or by cognitively enhanced biological intelligence and unable to keep pace.
