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AndyC comments on Circular Altruism - Less Wrong
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Thank you for trying to address this problem, as it's important and still bothers me.
But I don't find your idea of two different scales convincing. Consider electric shocks. We start with an imperceptibly low voltage and turn up the dial until the first level at which the victim is able to perceive slight discomfort (let's say one volt). Suppose we survey people and find that a one volt shock is about as unpleasant as a dust speck in the eye, and most people are indifferent between them.
Then we turn the dial up further, and by some level, let's say two hundred volts, the victim is in excruciating pain. We can survey people and find that a two hundred volt shock is equivalent to whatever kind of torture was being used in the original problem.
So one volt is equivalent to a dust speck (and so on the "trivial scale"), but two hundred volts is equivalent to torture (and so on the "nontrivial scale"). But this implies either that triviality exists only in degree (which ruins the entire argument, since enough triviality aggregated equals nontriviality) or that there must be a sharp discontinuity somewhere (eg a 21.32 volt shock is trivial, but a 21.33 volt shock is nontrivial). But the latter is absurd. Therefore there should not be separate trivial and nontrivial utility scales.
First of all, you might benefit from looking up the beard fallacy.
To address the issue at hand directly, though:
Of course there are sharp discontinuities. Not just one sharp discontinuity, but countless. However, there is not particular voltage at which there is a discontinuity. Rather, increasing the voltage increases the probability of a discontinuity.
I will list a few discontinuities established by torture.
Nightmares. As the electrocution experience becomes more severe, the probability that it will result in a nightmare increases. After 50 years of high voltage, hundreds or even thousands of such nightmares are likely to have occurred. However, 1 second of 1V is unlikely to result in even a single nightmare. The first nightmare is a sharp discontinuity. But furthermore, each additional nightmare is another sharp discontinuity.
Stress responses to associational triggers. The first such stress response is a sharp discontinuity, but so is every other one. But please note that there is a discontinuity for each instance of stress response that follows in your life: each one is its own discontinuity. So, if you will experience 10,500 stress responses, that is 10,500 discontinuities. It's impossible to say beforehand what voltage or how many seconds will make the difference between 10,499 and 10,500, but in theory a probability could be assigned. I think there are already actual studies that have measured the increased stress response after electroshock, over short periods.
Flashbacks. Again, the first flashback is a discontinuity; as is every other flashback. Every time you start crying during a flashback is another discontinuity.
Social problems. The first relationship that fails (e.g., first woman that leaves you) because of the social ramifications of damage to your psyche is a discontinuity. Every time you flee from a social event: another discontinuity. Every fight that you have with your parents as a result of your torture (and the fact that you have become unrecognizable to them) is a discontinuity. Every time you fail to make eye contact is a discontinuity. If not for the torture, you would have made the eye contact, and every failure represents a forked path in your entire future social life.
I could go on, but you can look up the symptoms of PTSD yourself. I hope, however, that I have impressed upon you the fact that life constitutes a series of discrete events, not a continuous plane of quantifiable and summable utility lines. It's "sharp discontinuities" all the way down to elementary particles. Be careful with mathematical models involving a continuum.
Please note that flashbacks, nightmares, stress responses to triggers, and social problems do not result from specs of dust in the eye.