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  • Let me tell you a story that is disturbing, but true.

  • In the year 2000, a 40 year old man was arrested for possessing child pornography, and molesting his 8 year old stepdaughter.

  • The man had no previous history of pedophilia, and he said that he was baffled and dismayed by what appeared to be a sudden turn in his sexual behavior.

  • While he was awaiting his day in court, the man began to complain of terrible headaches.

  • A brain scan revealed a large tumor in his orbitofrontal cortex, the part of the brain known to control sexual impulse.

  • The tumor was removed, and, it turned out, so were his pedophilic impulses.

  • But about a year later, those impulses returned.

  • Another scan revealed that the tumor had returned as well.

  • So, a second surgery removed the tumor, and the pedophilic behavior diminished, this time for good.

  • Now, here’s a question: Was that man’s really horrible behavior a matter of free will?

  • Or was it determinedby what turned out to be a medical condition?

  • Or was it neither?

  • Could it even have been both?

  • [Theme Music]

  • So far weve considered two metaphysical positions regarding the freenessor not

  • of our actions: hard determinism and libertarian free will.

  • If youve found both of them to be wanting, well, compatibilism might just be for you.

  • Compatibilists believe, somewhat like hard determinists, that the universe operates with

  • law-like order, and that the past determines the future.

  • But they also think there’s something different about some human actions;

  • that some of the actions we take really are free.

  • This view, known as soft determinism, says that everything is actually determined,

  • but we can still call an action free when the determination comes from within ourselves.

  • It’s like the difference between someone being pushed off a diving board, as opposed to jumping.

  • The result is the sameyou end up in the waterbut it does look like the cause is different.

  • In case 1, the cause is the pusher, while in case 2, the cause is the jumper.

  • Compatibilists say that in both cases, the action is determinedthat is, it couldn’t not happen.

  • But when the action of an agent is self-determinedor determined by causes internal to herselfthe action should be considered free.

  • This means that we might have moral responsibility for our actions,

  • since the determination for some of our acts can come from us alone.

  • And this was something, youll recall, that hard determinists seemed to have to give up.

  • But, it’s unclear how meaningful moral responsibility really is, in this view.

  • After all, if were still determined, just by our own internal factors, then in what sense are we actually responsible?

  • Which brings us back to the man with the brain tumor.

  • If a growth in your brain, which you have no control over, causes you to have impulses

  • that you also have no control overdo you act freely if you act on those urges?

  • Pedophilia-inducing brain tumors are, luckily, rare, but there are much more common cases that are similar.

  • For example, should we hold people who suffer from severe mental illnesses responsible for their actions?

  • After all, the causes of their actions are internal to themselves.

  • So a compatibilist might be inclined to say that theyre free.

  • Yet it seems wrong to blame someone who’s in the grip of, say, hallucinations in the same way that we’d blame someone who’s not.

  • What about someone who becomes flirty after a few drinks?

  • Do we assign that behavior to the drinker, or on the drinks?

  • The drinker’s actions are caused by factors internal to themselfthe alcohol, sure,

  • but also their body chemistry, how much they ate before drinking, and who knows how many other factors.

  • Last time, we learned about the Principle of Alternate Possibilities, and the long-standing

  • belief that, in order for an action to be free, an agent has to have been able to do something other than what theyve done.

  • But contemporary American philosopher Harry Frankfurt challenges this idea, by arguing

  • that an agent could, in some cases, be morally responsible for things he does, even when he couldn’t have done otherwise.

  • We call these situations Frankfurt Cases,

  • which brings us to the Thought Bubble to explore one in this week’s Flash Philosophy.

  • Suppose there’s a fervent supporter of the Democratic party, and he comes up with a crazy

  • plan to make sure his party wins in the next election.

  • He decides to abduct voters and plant devices in their brains

  • something that, as far as I know, neither party has tried yet!

  • Now, these devices are designed to remain dormant unless a voter is going to vote Republican,

  • in which case itll activate, and compel them to vote Democratic.

  • Now, suppose that you were one of the unlucky abductees, and you head to the polls with a device in your brain.

  • But, youve always been a lifelong Democrat, and device or no device, you have every intention of voting Democratic this time.

  • You enter the polling booth, vote a straight Democratic ticket, and head home.

  • Since you never had any intention of doing anything other than voting Democratic, the device was never activated.

  • However, if you had decided to vote Republican, you would have been prevented from doing so.

  • The Principle of Alternate Possibilities says you were not free in this case, because you couldn’t have done otherwise.

  • Even if you’d tried to vote Republican you would still have voted for Democrats.

  • But, Frankfurt argues: You were still clearly responsible for your vote.

  • You were responsible, because you did what you wanted to do, even though you could not have done otherwise.

  • Thanks, Thought Bubble. So what do you think?

  • Not about the next election – I mean, can you be responsible without being able to do otherwise?

  • If you wanted to watch Crash Course, and wouldve watched it on your own,

  • but now it’s playing in class and you don’t actually have any choice, are you watching me freely?

  • Frankfurt Cases play on an intuition that many of us sharethe idea that youre responsible for actions youve chosen.

  • And your choice needs to come from within yourself, rather than from outside factors.

  • But it’s unclear whether we can actually separate internal factors from external ones.

  • A group of friends pressuring you to get high is an external factor,

  • but your desire to conform, or maybe your desire not to care what others think of you, comes from within you.

  • Or does it?

  • Isn’t your personalityand how you respond to different situationsshaped by your parents, and friends, and earlier experiences?

  • Many think these kinds of examples reveal deep problems with compatibilism.

  • If we can’t separate internal and external causes, maybe the answer is to simply say that actions aremore or less free.”

  • And how free they are depends on how many internal factors are influencing us,

  • and how many external, and how much control we really have over what we do.

  • This is the view taken by contemporary Canadian-American philosopher Patricia Churchland.

  • Churchland points out that, as social animals, we can’t help but hold people accountable, and assign either praise or blame for their actions.

  • But it also makes sense to think about how much, or how little, someone is in control of their actions, when assigning praise or blame.

  • After all, some actions are beyond our control, like sneezing.

  • So I won’t blame you for sneezing, because you can’t really control that.

  • But I definitely will blame you for sneezing on my lunch, because you do have control over where you sneeze.

  • Likewise, I might blame you less for rude behavior when youve been drinking, as opposed to when youre sober,

  • but I probably won’t let you completely off the hook, because, at least under normal circumstances, you had control over your decision to drink.

  • So, Churchland says, askingAm I free?” is really the wrong question.

  • Instead, we should be asking, “How much control do I have?”

  • And the more control we have, the more responsibility we also have.

  • This view lets us keep what we know about the deterministic nature of the universe,

  • while also making sense of our subjective feeling of freedom.

  • So really, “feeling freereally just meanshaving control

  • We know disturbances in the brain can undermine our control, from seizures and tics to the pedophilic impulses that developed in the brain tumor patient.

  • But we also know that our brains can be trained to develop control over many aspects of our behavior.

  • Like the way you used to just pee whenever your bladder was full, but now youre able to control when and where you pee.

  • Congratulations on that, by the way.

  • But this means that we can choose to develop stronger levels of control over many of our actions,

  • which is what we do when we work to break a bad habit, or ingrain a good one.

  • Now, libertarians will point out that being caused to do something by internal factors still keeps our actions from being truly free.

  • These folks won’t be satisfied with Churchland’s answer, because it says that every one of our choices is still determined by something.

  • So we can’t ever make an undetermined choice.

  • But today, whether determined or not, we talked about compatibilism.

  • We considered whether our internally motivated actions can be understood as free in a deterministic world.

  • We also talked about Frankfurt Cases.

  • And we looked at Patricia Churchland’s rejection of the free-or-not-free dichotomy and her

  • focus on the amount of control we have over our actions.

  • Next time were going to move into a new unit, on the philosophy of language.

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  • Crash Course Philosophy is produced in association with PBS Digital Studios.

  • You can head over to their channel and check out a playlist of the latest episodes from shows like

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  • This episode of Crash Course was filmed in the Doctor Cheryl C. Kinney Crash Course Studio

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兼容性。哲學速成班#25 (Compatibilism: Crash Course Philosophy #25)

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    Jack 發佈於 2021 年 01 月 14 日
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