“American philosopher Robert Nozick (1938-2002) presented the following thought experiment:
Suppose there were an experience machine that would give you any experience you desired. Superduper neuropsychologists could stimulate your brain so that you would think and feel you were writing a great novel, or making a friend, or reading an interesting book. All the time you would be floating in a tank, with electrodes attached to your brain. (Nozick 1974:42)
Nozick imagined that the experience machine would be something that you could plug into for two years at a time. During each two year session you might live the experiences of great, legendary figures, or any kind of scenario that could be programmed. After each two year cycle in the experience machine, you would wake up, spend a few hours out of the tank, and then plug in for another two years. Each time you were plugged in, you would not be aware of the simulation — it would all feel like it is actually happening. And, importantly, anyone else could plug in to experience machines as well, so there would be no need to stay unplugged to tend to the needs of others.
Would you plug in?
Nozick believes that if such a machine existed, most people would refuse to use it.
First, he says, we want to do certain things, not just have the experience of doing them. The experience of living a great life is ultimately meaningless if we just wake up every two years to realize that none of it actually happened.
Secondly, we each want to be a certain kind of person. The experience machines nullifies our identity, and with it, any innate sense of value we might have. A person plugged into the machine, floating there in the tank, is only “an indeterminate blob” — no longer a kind, intelligent, or loving person. “Plugging into the machine is a kind of suicide.” (Ibid 43)
Thirdly, Nozick points out that the experience machine limits us to a “man-made reality, to a world no deeper or more important than which people can construct.” (Ibid)
Nozick’s argument is that experience itself, if divorced from everything else, is hollow and empty. Bliss, as an end in itself, ultimately adds nothing of value to existence. Experience seems to matter to the extent that it actually happens and results in changes in the real world. If we choose not to be plugged into the experience machine, it would suggest that something is more important to us than how our lives feel from the inside.
In other words, perhaps our greatest concern is who and what we are, not simply whether or not we happen to feel good.”