transcranial magnetic stimulation

The afterlife

PNRJ cognitive science, core principles, ethics, Logic of Kindness , , , , , , , , , , , , , ,

Dec 1 JDN 2460646

Super-human beings aren’t that strange a thing to posit, but they are the sort of thing we’d expect to see clear evidence of if they existed. Without them, prayer is a muddled concept that is difficult to distinguish from simply “things that don’t work”. That leaves the afterlife. Could there be an existence for human consciousness after death?

No. There isn’t. Once you’re dead, you’re dead. It’s really that unequivocal. It is customary in most discussions of this matter to hedge and fret and be “agnostic” about what might lie beyond the grave—but in fact the evidence is absolutely overwhelming.

Everything we know about neuroscience—literally everything—would have to be abandoned in order for an afterlife to make sense. The core of neuroscience, the foundation from which the entire field is built, is what I call the Basic Fact of Cognitive Science: you are your brain. It is your brain that feels, your brain that thinks, your brain that dreams, your brain that remembers. We do not yet understand most of these processes in detail—though some we actually do, such as the processing of visual images. But it doesn’t take an expert mechanic to know that removing the engine makes the car stop running. It doesn’t take a brilliant electrical engineer to know that smashing the CPU makes the computer stop working. Saying that your mind continues to work without your brain is like saying that you can continue to digest without having a stomach or intestines.

This fundamental truth underlies everything we know about the science of consciousness. It can even be directly verified in a piecemeal form: There are specific areas of your brain that, when damaged, will cause you to become blind, or unable to understand language, or unable to speak grammatically (those are two distinct areas), or destroy your ability to form new memories or recall old ones, or even eliminate your ability to recognize faces. Most terrifying of all—yet by no means surprising to anyone who really appreciates the Basic Fact—is the fact that damage to certain parts of your brain will even change your personality, often making you impulsive, paranoid or cruel, literally making you a worse person. More surprising and baffling is the fact that cutting your brain down the middle into left and right halves can split you into two people, each of whom operates half of your body (the opposite half, oddly enough), who mostly agree on things and work together but occasionally don’t. All of these are people we can actually interact with in laboratories, and (except for language deficits of course) talk to them about their experiences. It’s true that we can’t ask people what it’s like when their whole brain is dead, but of course not; there’s nobody left to ask.

This means that if you take away all the functions that experiments have shown require certain brain parts to function, whatever “soul” is left that survives brain death cannot do any of the following: See, hear, speak, understand, remember, recognize faces, or make moral decisions. In what sense is that worth calling a “soul”? In what sense is that you? Those are just the ones we know for sure; as our repertoire expands, more and more cognitive functions will be mapped to specific brain regions. And of course there’s no evidence that anything survives whatsoever.

Nor are near-death experiences any kind of evidence of an afterlife. Yes, some people who were close to dying or briefly technically dead (“He’s only mostly dead!”) have had very strange experiences during that time. Of course they did! Of course you’d have weird experiences as your brain is shutting down or struggling to keep itself online. Think about a computer that has had a magnet run over its hard drive; all sorts of weird glitches and errors are going to occur. (In fact, powerful magnets can have an effect on humans not all that dissimilar from what weaker magnets can do to computers! Certain sections of the brain can be disrupted or triggered in this way; it’s called transcranial magnetic stimulation and it’s actually a promising therapy for some neurological and psychological disorders.) People also have a tendency to over-interpret these experiences as supporting their particular religion, when in fact it’s usually something no more complicated than “a bright light” or “a long tunnel” (another popular item is “positive feelings”). If you stop and think about all the different ways you might come to see “a bright light” and have “positive feelings”, it should be pretty obvious that this isn’t evidence of St. Paul and the Pearly Gates.

The evidence against an afterlife is totally overwhelming. The fact that when we die, we are gone, is among the most certain facts in science. So why do people cling to this belief? Probably because it’s comforting—or rather because the truth that death is permanent and irrevocable is terrifying. You’re damn right it is; it’s basically the source of all other terror, in fact. But guess what? “Terrifying” does not mean “false”. The idea of an afterlife may be comforting, but it’s still obviously not true.

While I was in the process of writing this book, my father died of a ruptured intracranial aneurysm. The event was sudden and unexpected, and by the time I was able to fly from California to Michigan to see him, he had already lost consciousness—for what would turn out to be forever. This event caused me enormous grief, grief from which I may never fully recover. Nothing would make me happier than knowing that he was not truly gone, that he lives on somewhere watching over me. But alas, I know it is not true. He is gone. Forever.

However, I do have a couple of things to say that might offer some degree of consolation:

First, because human minds are software, pieces of our loved ones do go on—in us. Our memories of those we have lost are tiny shards of their souls. When we tell stories about them to others, we make copies of those shards; or to use a more modern metaphor, we back up their data in the cloud. Were we to somehow reassemble all these shards together, we could not rebuild the whole person—there are always missing pieces. But it is also not true that nothing remains. What we have left is how they touched our lives. And when we die, we will remain in how we touch the lives of others. And so on, and so on, as the ramifications of our deeds in life and the generations after us ripple out through the universe at the speed of light, until the end of time.

Moreover, if there’s no afterlife there can be no Hell, and Hell is literally the worst thing imaginable. To subject even a single person—even the most horrible person who ever lived, Hitler, Stalin, Mao, whomever—to the experience of maximum possible suffering forever is an atrocity of incomparable magnitude. Hitler may have deserved a million years of suffering for what he did—but I’m not so sure about maximum suffering, and forever is an awful lot longer than a million years. Indeed, forever is so much longer than a million years that if your sentence is forever, then after serving a million years you still have as much left to go as when you began. But the Bible doesn’t even just say that the most horrible mass murderers will go to Hell; no, it says everyone will go to Hell by default, and deserve it, and can only be forgiven if we believe. No amount of good works will save us from this fate, only God’s grace.

If you believe this—or even suspect it—religion has caused you deep psychological damage. This is the theology of an abusive father—“You must do exactly as I say, or you are worthless and undeserving of love and I will hurt you and it will be all your fault.” No human being, no matter what they have done or failed to do, could ever possibly deserve a punishment as terrible as maximum possible suffering forever. Even if you’re a serial rapist and murderer—and odds are, you’re not—you still don’t deserve to suffer forever. You have lived upon this planet for only a finite time; you can therefore only have committed finitely many crimes and you can only deserve at most finite suffering. In fact, the vast majority of the world’s population is comprised of good, decent people who deserve joy, not suffering.

Indeed, many ethicists would say that nobody deserves suffering, it is simply a necessary evil that we use as a deterrent from greater harms. I’m actually not sure I buy this—if you say that punishment is all about deterrence and not about desert, then you end up with the result that anything which deters someone could count as a fair punishment, even if it’s inflicted upon someone else who did nothing wrong. But no ethicist worthy of the name believes that anybody deserves eternal punishment—yet this is what Jesus says we all deserve in the Bible. And Muhammad says similar things in the Qur’an, about lakes of eternal burning (4:56) and eternal boiling water to drink (47:15) and so on. It’s entirely understandable that such things would motivate you—indeed, they should motivate you completely to do just about anything—if you believed they were true. What I don’t get is why anybody would believe they are true. And I certainly don’t get why anyone would be willing to traumatize their children with these horrific lies.

Then there is Pascal’s Wager: An infinite punishment can motivate you if it has any finite probability, right? Theoretically, yes… but here’s the problem with that line of reasoning: Anybody can just threaten you with infinite punishment to make you do anything. Clearly something is wrong with your decision theory if any psychopath can just make you do whatever he wants because you’re afraid of what might happen just in case what he says might possibly be true. Beware of plausible-seeming theories that lead to such absurd conclusions; it may not be obvious what’s wrong with the argument, but it should be obvious that something is.

Medical progress, at least, is real

PNRJ core principles, development economics, futurism, personal , , , , , , , , , , , , , ,

May 26 JDN 2460457

The following vignettes are about me.

Well, one of them is about me as I actually am. The others are about the person I would have been, if someone very much like me, with the same medical conditions, had been born in a particular place and time. Someone in these times and places probably had actual experiences like this, though of course we’ll never know who they were.

976 BC, the hilled lands near the mouth of the river:

Since I was fourteen years old, I have woken up almost every day in pain. Often it is mild, but occasionally it is severe. It often seems to be worse when I encounter certain plants, or if I awaken too early, or if I exert myself too much, or if a storm is coming. No one knows why. The healers have tried every herb and tincture imaginable in their efforts to cure me, but nothing has worked. The priests believe it is a curse from the gods, but at least they appreciate my ability to sometimes predict storms. I am lucky to even remain alive, as I am of little use to the tribe. I will most likely remain this way the rest of my life.

24 AD, Rome:

Since I was fourteen years old, I have woken up almost every day in pain. Often it is mild, but occasionally it is severe. It often seems to be worse when I encounter certain plants, or if I awaken too early, or if I exert myself too much, or if a storm is coming. No one knows why. The healers have tried every herb and tincture imaginable in their efforts to cure me, but nothing has worked. The priests believe it is a curse from the gods, but at least they appreciate my ability to sometimes predict storms. I am lucky that my family was rich enough to teach me reading and mathematics, as I would be of little use for farm work, but can at least be somewhat productive as a scribe and a tutor. I will most likely remain this way the rest of my life.

1024 AD, England:

Since I was fourteen years old, I have woken up almost every day in pain. Often it is mild, but occasionally it is severe. It often seems to be worse when I encounter certain plants, or if I awaken too early, or if I exert myself too much, or if a storm is coming. No one knows why. The healers have tried every herb and tincture imaginable in their efforts to cure me, but nothing has worked. The priests believe it is a curse imposed upon me by some witchcraft, but at least they appreciate my ability to sometimes predict storms. I am lucky that my family was rich enough to teach me reading and mathematics, as I would be of little use for farm work, but can at least be somewhat productive as a scribe and a tutor. I will most likely remain this way the rest of my life.

2024 AD, Michigan:

Since I was fourteen years old, I have woken up almost every day in pain. Often it is mild, but occasionally it is severe. It often seems to be worse when I encounter certain pollens, fragrances, or chemicals, or if I awaken too early, or if I exert myself too much, or when the air pressure changes before a storm. Brain scans detected no gross abnormalities. I have been diagnosed with chronic migraine, but this is more a description of my symptoms than an explanation. I have tried over a dozen different preventative medications; most of them didn’t work at all, some of them worked but gave me intolerable side effects. (One didn’t work at all and put me in the hospital with a severe allergic reaction.) I’ve been more successful with acute medications, which at least work as advertised, but I have to ration them carefully to avoid rebound effects. And the most effective acute medication is a subcutaneous injection that makes me extremely nauseated unless I also take powerful anti-emetics along with it. I have had the most success with botulinum toxin injections, so I will be going back to that soon; but I am also looking into transcranial magnetic stimulation. Currently my condition is severe enough that I can’t return to full-time work, but I am hopeful that with future treatment I will be able to someday. For now, I can at least work as a writer and a tutor. Hopefully things get better soon.

3024 AD, Aegir 7, Ran System:

For a few months when I was fourteen years old, I woke up nearly every day in pain. Often it was mild, but occasionally it was severe. It often seemed to be worse when I encountered certain pollens, fragrances or chemicals, or if I awakened too early, or if I exerted myself too much, or when the air pressure changed before a storm. Brain scans detected no gross abnormalities, only subtle misfiring patterns. Genetic analysis confirmed I had chronic migraine type IVb, and treatment commenced immediately. Acute medications suppressed the pain while I underwent gene therapy and deep-effect transcranial magnetic stimulation. After three months of treatment, I was cured. That was an awful few months, but it’s twenty years behind me now. I can scarcely imagine how it might have impaired my life if it had gone on that whole time.

What is the moral of this story?

Medical progress is real.

Many people often doubt that society has made real progress. And in a lot of ways, maybe it hasn’t. Human nature is still the same, and so many of the problems we suffer have remained the same.

Economically, of course we have had tremendous growth in productivity and output, but it doesn’t really seem to have made us much happier. We have all this stuff, but we’re still struggling and miserable as a handful at the top become spectacularly, disgustingly rich.

Social progress seems to have gone better: Institutions have improved, more of the world is democratic than ever before, and women and minorities are better represented and better protected from oppression. Rates of violence have declined to some of their lowest levels in history. But even then, it’s pretty clear that we have a long, long way to go.

But medical progress is undeniable. We live longer, healthier lives than at any other point in history. Our infant and child mortality rates have plummeted. Even chronic conditions that seem intractable today (such as my chronic migraines) still show signs of progress; in a few generations they should be cured—in surely far less than the thousand years I’ve considered here.

Like most measures of progress, this change wasn’t slow and gradual over thousands of years; it happened remarkably suddenly. Humans went almost 200,000 years without any detectable progress in medicine, using basically the same herbs and tinctures (and a variety of localized and ever-changing superstitions) the entire time. Some of it worked (the herbs and tinctures, at least), but mostly it didn’t. Then, starting around the 18th century, as the Enlightenment took hold and Industrial Revolution ramped up, everything began to change.

We began to test our medicine and see if it actually worked. (Yes, amazingly, somehow, nobody had actually ever thought to do that before—not in anything resembling a scientific way.) And when we learned that most of it didn’t, we began to develop new methods, and see if those worked; and when they didn’t either, we tried new things instead—until, finally, eventually, we actually found medicines that actually did something, medicines worthy of the name. Our understanding of anatomy and biology greatly improved as well, allowing us to make better predictions about the effects our medicines would have. And after a few hundred years of that—a few hundred, out of two hundred thousand years of our species—we actually reached the point where most medicine is effective and a variety of health conditions are simply curable or preventable, including diseases like malaria and polio that had once literally plagued us.

Scientific medicine brought humanity into a whole new era of existence.

I could have set the first vignette 10,000 years ago without changing it. But the final vignette I could probably have set only 200 years from now. I’m actually assuming remarkable stagnation by putting it in the 31st century; but presumably technological advancement will slow at one point, perhaps after we’ve more or less run out of difficult challenges to resolve. (Then again, for all I know, maybe my 31st century counterpart will be an emulated consciousness, and his chronic pain will be resolved in 17.482 seconds by a code update.)

Indeed, the really crazy thing about all this is that there are still millions of people who don’t believe in scientific medicine, who want to use “homeopathy” or “naturopathy” or “acupuncture” or “chiropractic” or whatever else—who basically want to go back to those same old herbs and tinctures that maybe sometimes kinda worked but probably not and nobody really knows. (I have a cousin who is a chiropractor. I try to be polite about it, but….) They point out the various ways that scientific medicine has failed—and believe me, I am painfully aware of those failures—but then where the obvious solution is to improve scientific medicine, they instead want to turn the whole ship around, and go back to what we had before, which was obviously a million times worse.

And don’t tell me it’s harmless: One, it’s a completewaste of resources that could instead have been used for actual scientific medicine. (9% of all out-of-pocket spending on healthcare in the US is on “alternative medicine”—which is to say, on pointless nonsense.) Two, when you have a chronic illness and people keep shoving nonsense treatments in your face, you start to feel blamed for your condition: “Why haven’t you tried [other incredibly stupid idea that obviously won’t work]? You’re so closed-minded! Maybe your illness isn’t really that bad, or you’d be more desperate!” If “alternative medicine” didn’t exist, maybe these people could help me cope with the challenges of living with a chronic illness, or even just sympathize with me, instead of constantly shoving stupid nonsense in my face.

Not everything about the future looks bright.

In particular, I am pessimistic about the near-term future of artificial intelligence, which I think will cause a lot more problems than it solves and does have a small—but not negligible—risk of causing a global catastrophe.

I’m also not very optimistic about climate change; I don’t think it will wipe out our civilization or anything so catastrophic, but I do think it’s going to kill millions of people and we’ve done too little, too late to prevent that. We’re now doing about what we should have been doing in the 1980s.

But I am optimistic about scientific medicine. Every day, new discoveries are made. Every day, new treatments are invented. Yes, there is a lot we haven’t figured out how to cure yet; but people are working on it.

And maybe they could do it faster if we stopped wasting time on stuff that obviously won’t work.