"What's the worst that can happen?" goes the optimistic saying. It's probably a bad question to ask anyone with a creative imagination. Let's consider the problem on an individual level: it's not really the worst that can happen, but would nonetheless be fairly bad, if you were horribly tortured for a number of years. This is one of the worse things that can realistically happen to one person in today's world.
What's the least bad, bad thing that can happen? Well, suppose a dust speck floated into your eye and irritated it just a little, for a fraction of a second, barely enough to make you notice before you blink and wipe away the dust speck.
For our next ingredient, we need a large number. Let's use 3^^^3, written in Knuth's up-arrow notation:
- 3^3 = 27.
- 3^^3 = (3^(3^3)) = 3^27 = 7625597484987.
- 3^^^3 = (3^^(3^^3)) = 3^^7625597484987 = (3^(3^(3^(... 7625597484987 times ...)))).
3^^^3 is an exponential tower of 3s which is 7,625,597,484,987 layers tall. You start with 1; raise 3 to the power of 1 to get 3; raise 3 to the power of 3 to get 27; raise 3 to the power of 27 to get 7625597484987; raise 3 to the power of 7625597484987 to get a number much larger than the number of atoms in the universe, but which could still be written down in base 10, on 100 square kilometers of paper; then raise 3 to that power; and continue until you've exponentiated 7625597484987 times. That's 3^^^3. It's the smallest simple inconceivably huge number I know.
Now here's the moral dilemma. If neither event is going to happen to you personally, but you still had to choose one or the other:
Would you prefer that one person be horribly tortured for fifty years without hope or rest, or that 3^^^3 people get dust specks in their eyes?
I think the answer is obvious. How about you?
Zubon, we could formalize this with a tiered utility function (one not order-isomorphic to the reals, but containing several strata each order-isomorphic to the reals).
But then there is a magic penny, a single sharp divide where no matter how many googols of pieces you break it into, it is better to torture 3^^^3 people for 9.99 seconds than to torture one person for 10.01 seconds. There is a price for departing the simple utility function, and reasons to prefer certain kinds of simplicity. I'll admit you can't slice it down further than the essentially digital brain; at some point, neurons do or don't fire. This rules out divisions of genuine googolplexes, rather than simple billions of fine gradations. But if you admit a tiered utility function, it will sooner or later come down to one neuron firing.
And I'll bet that most Speckists disagree on which neuron firing is the magical one. So that for all their horror at us Unspeckists, they will be just as horrified at each other, when one of them claims that thirty seconds of waterboarding is better than 3^^^3 people poked with needles, and the other disagrees.