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Too much information, 2

In the 1970s, biofeedback experiments showed that people could learn to alter their EEG rhythms and skin temperature. Many suggested that we might be able to gain more extensive conscious control of physiological functions "under the hood." In "Autonomy," Lewis Thomas responded:

"My trouble, to be quite candid, is a lack of confidence in myself. If I were informed tomorrow that I was in direct communication with my liver, and could now take over, I would become deeply depressed. I'd sooner be told, forty thousand feet over Denver, that the 747 jet in which I had a coach seat was now mine to operate as I pleased... Nothing would save me and my liver, if I were in charge. For I am, to face the facts squarely, considerably less intelligent than my liver. I am, moreover, constitutionally unable to make hepatic decisions, and I prefer not to be obliged to, ever."

This is not Luddite "some things Man was not meant to know...", nor Dave Barry whimsy. This is a very practical acknowledgment that there are good reasons for the relatively narrow, high-level user interface we have.