Patrick Sharkey [twitter: patrick_sharkey] uses a Twitter thread to evaluate the evidence about a possible relationship between exposure to lead and crime. The thread is a bit hard to get unspooled correctly, but it’s worth it as an example of:

1. Thinking carefully about complex evidence and data.

2. How Twitter affects the reasoning and its expression.

3. The complexity of data, which will only get worse (= better) as machine learning can scale up their size and complexity.

Note: I lack the skills and knowledge to evaluate Patrick’s reasoning. And, hat tip to David Lazer for the retweet of the thread.

Be the first to comment »

I was talking with someone the other day who who was telling me about her response to the “trolley” problem that professors in a surprising number of different fields like to pose. (It was first posed by the philosopher Philippa Foot in 1967.) In essence: you’re standing next to a switch. A trolley is barreling down the tracks. Weirdly, there are five people tied up at the end of the tracks. You can pull the switch to put the trolley onto a new track but — what a coincidence! — there’s a man on that track also. What do you do?

This woman said she’d throw herself in front of the trolley. Creative and noble, but …

…Even assuming that that would stop the trolley and that it wouldn’t overturn the trolley which happens to be full of the most adorable babies who would all have grown up to be Nobel Prize winners , it only affects decisions if morality is the adherence to principles or is the outcome of personal virtues, or some such. Whether you or the solitary man on the track dies is of no interest to the utilitarian calculus, unless you throw in some more information, such as you are a reprobate who only has two weeks to live anyway, and the man on the tracks is an adorable baby whom we know will grow up to be the greatest Nobel Prize winner of them all.

But the real problem is that the woman I was speaking with violated the Rule of Hypotheticals: The person who makes the hypothetical gets to define the hypothetical.

Hypotheticals in moral reasoning often are intended to confound us. The trolley case challenges our intuition: Of course the rational action would be to sacrifice the one for the many, but if we vividly put ourselves in the position of the person at the switch, we may find it hard to imagine ourselves taking an action that we know will kill someone. Variations of this try to make it even harder for us to imagine ourselves taking that step: Suppose we could push someone in front of the trolley to save the many? Suppose the person we pushed were young and healthy, in a wheel chair, fat? (Fat? Yup, the person has to have sufficient mass to stop the trolley, but, really, the Hypothesizer could just have specified that even a thin person would stop this particular trolley and avoided any implication that the weight of the person has something to do with her/his value.)

So, we construct hypotheticals, making them as weird as we need, in order to show that a moral principle or guideline is unreliable. In the classic case, we first convince our students that utilitarianism makes sense. Then we give them a hypothetical in which it’s pretty clear that utilitarianism leads to an unjust outcome. The canonical example is a sheriff who hangs an innocent man because it’s the only way to reassure a terrified town that a killer has been caught; the sherif knows the real killer drowned but can’t prove it for some unlikely hypothetical reason. (And thus was rule utilitarianism born.)

I am very sympathetic to the idea that moral reasoning is premised on moral empathy: to be moral requires recognizing that we share a world with people to whom that world matters differently but equality. But I have problems with morality-by-extreme-hypothesis.

These hypotheses are extreme on purpose. They want to clarify our thinking, so they remove all extraneous context and they remove every possible escape from the dilemma. For example, we’re asked to imagine that a terrorist has planted a dirty bomb in NYC and the only way to get the information out of him (inevitably a him because that’s more “neutral”) is to torture him. “But how do we know that he has the information?” “A reliable informant.” “How do we know the informant’s reliable?” ” That’s part of the hypothetical.” Oooookay, but life doesn’t work that way.

Because hypotheticals are usually weird — if they weren’t we would’t need them — it’s hard to know that we can trust our reactions to them, and it’s hard to know if the right action in that case generalizes to all cases.

I suppose these hypotheses can disprove that any particular moral theory is sufficient for all cases. But once we give up on that idea, the question becomes: What’s the right thing to do? What’s the right theory — or theories — to apply in this non-hypothetical case?

Ultimately, I believe that as sentient creatures we have the obligation to do right, but there isn’t a right thing to do. Why would we think that there is? The people affected, and even those who merely observe, are right to carry on their arguments and to make their positions and their plights clear. We should and will never stop. But there can be no resolution because every aspect of our existence as individuals and as groups is in play and has its own interests. So we do the best we can. But the notion that there is a single right answer to any sufficiently complex moral question strikes me as wishful thinking. There is no single action that is all right because the world is not the same to any one of us.

That’s the real problem I have with these sorts of hypotheticals. Their virtue is clarity and simplicity, which means they miss the essential reality of our lives as moral creatures.

So, my answer to the trolley question is: Pull the switch. Sacrifice the one for the many. Then grieve for the rest of your life because its never enough just to be right.

1 Comment »