In which I piss on the ‘Dude’s rug

I’ve recently had a bit of a back-and-forth with the Skepdude that eventually spilled out onto Twitter. I started writing this post when it appeared that my last comment might languish in eternal moderation, but it has since shown up, so kudos to Skepdude for exceeding my pessimistic expectations. If this post hadn’t turned into a larger commentary before that bit posted, I might have deleted the whole thing. As it stands, I’ve used poor Skepdude as a springboard.

In any case, you can go ahead and read the relevant posts, then come back here and read my further commentary. It’s okay, I’ll wait.

Back? Great. Here’s the further commentary.

I think this conversation touches on a few key points relevant to skeptical activism. The first is this trepidation regarding basic rhetoric. We tend to throw around “rhetoric” in a disparaging fashion, often in the context of “baseless rhetoric” or “empty rhetoric.” And those can be to the point, but I think we run the risk of forgetting that rhetoric is the art of argumentation, the set of tools and strategies available to craft convincing arguments.

We’ve heard a lot from skeptics and scientists in the past few years claiming to be communications experts and saying that skeptics and scientists need to communicate better; we’ve all seen and complained about debates and discussions where the rational types fail because they can’t argue or work a crowd as well as their irrational opponents. These are both, to some degree, failures of rhetoric. Scientists are trained to argue in arenas and fora where facts and evidence are the most important thing, and the only convincing thing. That’s great if you’re defending a dissertation or critiquing a journal article, but as we’ve seen time and time again, it doesn’t translate to success in debates outside the university. Kent Hovind and Ray Comfort and Deepak Chopra may be blinkered idiots without a fact between the three of them, which would mean death in a scientific arena, but in the arena of public discourse, it becomes a strength. Because when you have no facts to work with, you have to make sure that the rest of your techniques have enough glitz and flash to distract the audience from your lack of substance. Scientists ignore the style, knowing they have substance, unaware or naïve about audiences’ universal love for shiny things.

We in the skeptic community, such as it is, have spent a lot of time recently debating whether it’s better to use honey or vinegar; one lesson we should all take away from that, however, is that facts and logic are bland on their own. You need to dress them up with spices and sauces if you expect anyone to want to swallow them. If one of your goals is to convince human beings–not, say, robots or Vulcans–then you can’t rely on pure logic alone.

Moving back to Skepdude, he seems to be in two places in this argument. On one hand, he seems to think that we can ignore ethos and pathos, and argue on logos alone. Depending on his purpose, this may be enough. I don’t know what his goals are, in particular, but if he is content with arguing in such a way as to make his points clear and valid to any philosopher, scientist, or skeptic who happens to be reading them, then arguing with pure logic might be all he needs. Heck, he could break everything down and put it into those crazy modal logic proofs, and save himself a lot of typing.

But if he’s hoping to make his arguments convincing to a broader swath of people–and the amount of rhetorical questions and righteous anger in some of his other posts suggests that he is, and that he already knows this–then he’s going to need to slather those bland syllogisms in tasty pathos and savory ethos.

But here’s where I have the problem, and nowhere was it more apparent than in our Twitter conversation, while he elevates and venerates logic, he doesn’t understand a pretty basic principle of it, which is how fallacies–in particular, the ad hominem fallacy–work.

The whole post revolves around skeptics saying that Jenny McCarthy claims to oppose toxins yet uses Botox. Skepdude calls this an ad hominem fallacy. And I can see where it could be. Where he makes his mistake–and where most people who mistakenly accuse ad hominem make the mistake–is in failing to understand that ad hominem fallacies are all about the specific context. It’s true; if my only response to Jenny McCarthy’s anti-toxin arguments were “Yeah, well you put botox in your face, so who cares what you think,” I’d be dismissing her arguments fallaciously, by attacking her character–specifically, by suggesting that her actions invalidate her arguments.

But that doesn’t mean that any time I were to bring up McCarthy’s botox use would be fallacious. Let’s say I said, for instance, “You claim to be anti-toxin, yet you use botox; that suggests you’re a hypocrite, or that you don’t understand what toxins are.” Now, if I left it at that, it would still be fallacious; saying just that in response to her anti-vaccine arguments would be fallaciously dismissing them on the basis of her character.

Now, let’s imagine I said: “In fact, all the evidence demonstrates that the ‘toxins’ you insinuate are in vaccines are, in fact, present in non-toxic doses. Furthermore, the evidence shows that there is no link between vaccines and any autism spectrum disorder.” This bit addresses the substance of her argument, and does so using facts and evidence. If I further added “Also, you claim to be anti-toxin, yet you use botox; either you’re a hypocrite, or you don’t understand what toxins are,” I would most definitely be attacking her character, but it would not be fallacious because I wouldn’t be using it to dismiss her arguments.

The ad hominem fallacy requires that last part: in order for it to be fallacious, in order for it to render your argument invalid, you must be using the personal attack to dismiss your opponent’s arguments. Otherwise, it’s just a personal attack.

Skepdude disagrees:

This is what he linked to, by the way.

I replied:

And these were my links: 1 2 3.

And then I walked away from Twitter for a few hours, because I’m getting better at knowing when to end things.

And then I started writing this post, because I’m still not very good at it. I’d respond to the ‘Dude on Twitter, but I feel bad dredging up topics after several hours, and I know what I’m going to say won’t fit well in Tweets.

Anyway, the ‘Dude responded some more:

Oh, I’m so glad to have your permission. I would have tossed and turned all night otherwise.


Yes, you can infer what someone’s saying from their speech. I can even see some situations where the implication is strong enough to qualify as a logical fallacy–of course, the implication has to be an argument before it can be a fallacious one, and that’s a lot to hang on an implied concept–but that is, after all, the whole point of the Unstated Major Premise. However, (as I said in tweets) there’s a razor-thin line between inferring what an argument left unstated and creating a straw man argument that’s easier to knock down (because it contains a fallacy).

Skepdude even found a quote–in one of my links, no less!–that he thought supported this view:

He’s right, the ad hominem fallacy there doesn’t end with “therefore he’s wrong;” most ad hominem fallacies don’t. His point, however, isn’t as right, as a look at the full quote will demonstrate:

Argumentum ad hominem literally means “argument directed at the man”; there are two varieties.

The first is the abusive form. If you refuse to accept a statement, and justify your refusal by criticizing the person who made the statement, then you are guilty of abusive argumentum ad hominem. For example:

“You claim that atheists can be moral–yet I happen to know that you abandoned your wife and children.”

This is a fallacy because the truth of an assertion doesn’t depend on the virtues of the person asserting it.

Did you catch it? Here’s the relevant bit again: “If you refuse to accept a statement, and justify your refusal by criticizing the person who made the statement, then you are guilty of abusive argumentum ad hominem.” The point isn’t that the anti-atheist arguer attacked the atheist speaker to justify rejecting his argument.

So, once again, context is key. If, for instance, the atheist had argued “all atheists are moral,” the “you abandoned your wife and children” comment would be a totally valid counterargument. The key in the example given was that the anti-atheist respondent used his attack on the atheist arguer to dismiss their argument, in lieu of actually engaging that argument. A point which my other links, which went into greater detail, all made clear.

I’ll say it again: in order for it to be an ad hominem, the personal attack has to be directly used to dismiss the argument. Dismissing the argument on other grounds and employing a personal attack as an aside or to some other end is, by definition, not an ad hominem. You don’t have to take my word for it, either:

In reality, ad hominem is unrelated to sarcasm or personal abuse. Argumentum ad hominem is the logical fallacy of attempting to undermine a speaker’s argument by attacking the speaker instead of addressing the argument. The mere presence of a personal attack does not indicate ad hominem: the attack must be used for the purpose of undermining the argument, or otherwise the logical fallacy isn’t there. It is not a logical fallacy to attack someone; the fallacy comes from assuming that a personal attack is also necessarily an attack on that person’s arguments. (Source

For instance, ad hominem is one of the most frequently misidentified fallacies, probably because it is one of the best known ones. Many people seem to think that any personal criticism, attack, or insult counts as an ad hominem fallacy. Moreover, in some contexts the phrase “ad hominem” may refer to an ethical lapse, rather than a logical mistake, as it may be a violation of debate etiquette to engage in personalities. So, in addition to ignorance, there is also the possibility of equivocation on the meaning of “ad hominem”.

For instance, the charge of “ad hominem” is often raised during American political campaigns, but is seldom logically warranted. We vote for, elect, and are governed by politicians, not platforms; in fact, political platforms are primarily symbolic and seldom enacted. So, personal criticisms are logically relevant to deciding who to vote for. Of course, such criticisms may be logically relevant but factually mistaken, or wrong in some other non-logical way.
[…]
An Abusive Ad Hominem occurs when an attack on the character or other irrelevant personal qualities of the opposition—such as appearance—is offered as evidence against her position. Such attacks are often effective distractions (“red herrings”), because the opponent feels it necessary to defend herself, thus being distracted from the topic of the debate. (Source)

Gratuitous verbal abuse or “name-calling” itself is not an argumentum ad hominem or a logical fallacy. The fallacy only occurs if personal attacks are employed instead of an argument to devalue an argument by attacking the speaker, not personal insults in the middle of an otherwise sound argument or insults that stand alone.(Source)

And so on, ad infinitum.

To return to the original point, let’s say a skeptic has said “Jenny McCarthy speaks of dangerous ‘toxins’ in vaccines, yet she gets Botox shots, which include botulinum, one of the most toxic substances around, right on her face.” Removed from its context, we cannot infer what the arguer intended. I can see three basic scenarios:

  1. The skeptic has used the phrase as evidence to dismiss Jenny McCarthy’s arguments about “dangerous ‘toxins’ in vaccines,” and has thus committed an ad hominem fallacy.
  2. The skeptic has used the phrase as an aside, in addition to a valid counter-argument against her anti-vaccine claims. This would not be an ad hominem fallacy.
  3. The skeptic has used the phrase as evidence for a separate but relevant argument, such as discussing Jenny McCarthy’s credibility as a scientific authority, in addition to dismissing her arguments with valid responses. This would not be an ad hominem fallacy.

There are other permutations, I’m sure, but I think these are the likeliest ones, and only one out of the three is fallacious. Moreover, trying to infer such a fallacy into those latter two arguments would not be valid cause to dismiss them, but it would probably demonstrate a lack of reading comprehension or a predisposition to dismiss such arguments.

Let’s say I’ve just finished demolishing McCarthy’s usual anti-vax arguments, and then I say “She must not be very anti-toxin if she gets Botox treatments on a regular basis.” Would it be reasonable to infer that I meant to use that statement as fallacious evidence against her point? I think not. If I’ve already addressed her point with evidence and logic, how could you infer that my aside, which is evidence- and logic-free, was also meant to be used as evidence in the argument I’ve already finished debunking?

On the other hand, let’s say I’ve done the same, and then I say “plus, it’s clear that Jenny doesn’t actually understand how toxins work. Toxicity is all about the dose. She thinks that children are in danger from the miniscule doses of vaccine preservatives they receive in a typical vaccine regimen, and yet she gets botox treatments, which require far larger dosages of a far more potent toxin. If toxins worked the way she apparently thinks they do, she’d be dead several times over.” Same point used in service of a separate argument. Would it be reasonable to infer here that I meant the point to be used as evidence against her anti-vaccine claims? Obviously not.

The only case in which it would be reasonable to make that inference would be some variation of me using that claim specifically to dismiss her argument. Maybe I say it in isolation–“Obviously she’s wrong about toxins; after all, she uses botox”–maybe I say it along with other things–“Former Playboy Playmate Jenny McCarthy says she’s anti-toxin, but uses botox. Sounds like a bigger mistake than picking her nose on national TV”–but those are fallacies only because I’m using the irrelevant personal attack to dismiss her argument.

So why have I put aside everything else I need to do on Sunday night to belabor this point? Well, I think that it’s a fine point, but one worth taking the time to understand. Skepdude’s argument is sloppy; he doesn’t seem to understand the fine distinctions between fallacious ad hominem and stand-alone personal attacks or valid ethical arguments, and so he’s advocating that skeptics stop using arguments that could potentially be mistaken for ad hominem fallacies. That way he–and the rest of us–could keep on being sloppy in our understanding and accusations of fallacies and not have to worry about facing any consequences for that sloppiness.

I can’t help but be reminded of my brother. When he was a kid, he did a crappy job mowing the lawn, and would get chewed out for it. He could have taken a little more time and effort to learn how to do it right–heck, I offered to teach him–but he didn’t. Rather, by doing it sloppily, he ensured that he’d only be asked to do it as a last resort; either Dad or I would take care of it, because we’d rather see it done right. He didn’t have to learn how to do a good job because doing a crappy job meant he could avoid doing the job altogether. By avoiding the job altogether, he avoided the criticism and consequences as well.

The problem, of course, is that the people who actually knew what they were doing had to pick up the slack.

This is the issue with Skepdude’s argument here, and I think it’s a point worth making. I disagree with those people who want to make skepticism into some academic discipline where everything is SRS BZNS, but that doesn’t mean that I don’t think we shouldn’t have some reasonable standards. Argumentation is a discipline and an art. It takes work, it takes research and effort, and it requires you to understand some very subtle points. It’s often hard to distinguish a fallacious argument from a valid one, especially in some of the common skeptical topics, since some of the woo-woo crowd have become quite adept at obfuscating their fallacies. It’s not enough to get a general idea and move on; logic and science require clarity and specificity from both terms and arguments. “Ad hominem fallacy” means a certain, very particular thing, and it’s not enough to get a general idea and figure that it’s close enough. If you know what the fallacies actually are and you structure your arguments and your rhetoric in ways that are sound and effective, then you don’t need to worry about people mistaking some bit of your writing for some logical fallacy. You get to say, “no, in fact, that’s not a fallacy, but I could see where you might make that mistake. Here’s why…” When you do the job right, when your arguments are valid and stand on their own, then you don’t need to fear criticism and accusation. Isn’t that what we tell every psychic, homeopath, and theist who claims to have the truth on their side? “If your beliefs are true, then you have nothing to fear from scientific inquiry/the Million Dollar Challenge/reasonable questions”? Why wouldn’t we require the same standard from our own points and arguments?

Skepdude, I apologize for making this lengthy, snarky reply. I generally agree with you, and I obviously wouldn’t follow you on Twitter if I didn’t generally like what you have to say. But on this point, which I think is important, I think you’re clearly wrong, and I think it’s important to correct. Feel free to respond here or in the comments at your post; I obviously can’t carry out this kind of discussion on Twitter.

Birds of a Feather

So, by now you’ve all heard about the guys who brought guns, including an assault rifle, to a public event held by the President, ostensibly to exercise their right to bear arms. I could quibble about spheres of appropriateness–seems like bringing guns to a political event with the President could be curtailed quite justifiably under the law–but I don’t have to. Apparently, part of the event was staged by (surprise, surprise) some guy who supported and defended an anti-government militia in the ’90s. He’s a 9/11 conspiracist, thinks Waco was some kind of government fabrication, and designed the cuckoobananas “Ron Paul rEVOLution” logo. So, you know, an all-around nut.

Well, I managed to catch a bit of video from that event, and happened to notice a big banner in the back reading “VACCINES = POISON.” It’s interesting to see how insanity is apparently magnetic. It’s a nice reminder that irrational beliefs often tend to beget more irrational beliefs. There are many different pathways that one can take to any belief, but when the belief is unsupported by facts, evidence, or reason, it seems like the paths are much more numerous and intertwined. Most antivaxxers seem to have arrived at that point through fearmongering and arguments from ignorance and false authority, but some arrive there through acceptance of anti-science or anti-medicine positions, others arrive there through conspiracy theories and anti-government ideologies, others still arrive through religious convictions.

Following reason, science, and evidence is difficult, but it leads you on paths that converge asymptotically on stable answers. Following pseudoscience and unreason can take you absolutely anywhere, and the vast majority of the destinations are completely wrong.

But I guess at least you’ll have company there.

Singling Out people who talk through their asses

Hey, world, guess what: if you stake your children’s lives on medical advice from these people:
This is how I always picture Jenny McCarthy: hard at work squeezing out her next book.I really tried to find one of the butt-talking shots, but my Google-fu is weak.
Then congratulations, you’re a giant moron. Somehow, you’ve decided that the word of two celebrities whose popularity averages out to C-list (at best) trumps the mountains upon mountains of actual scientific evidence from actual scientists.

I can hear the cries now: “but Jenny and Jim have scientists on their side!” Yes, and so do the flat-Earthers, the Creationists, and (to co-opt the antivax crowd’s favorite example) the tobacco companies. What Jenny and Jim and Generation Rescue and Age of Autism and the other pro-disease groups don’t have is anything resembling a preponderance of evidence to support their hypotheses. They don’t even have enough evidence to make their hypothesis seem like a worthwhile and plausible research avenue. After the MMR/Autism link was demonstrated to be the result of an interest-conflicted researcher gaming the data from small poorly-controlled studies using analysis from a compromised lab, the antivax crowd changed the hypothesis–now the connection was proposed to be the mercury in thimerosal, not the measles virus in MMR. So the real scientists rolled up their sleeves again, the legal process bent over backwards to accommodate the antivaxxers’ suspicions, and thimerosal was removed from childhood vaccines while scientists tested the hypothesis. Study after study, data set after data set, have refuted the purported link between thimerosal and autism, and oh by the way, there’s no proposed mechanism for such a link anyway, given what we already know about how ethylmercury compounds like thimerosal interact with the body. Now the antivaxxers have shifted the goalposts again, retreating to that refuge of scoundrels and charlatans, the vague and unscientific notion of “toxins.” They throw out terms designed to baffle and frighten the chemistry-illiterate public and intentionally fail to understand the important role of dosage in determining a substance’s toxicity. And despite this failure to comprehend basic things like measurement, they augment this toxin gambit with a mantra of “too many, too soon.” Yes, curse those doctors for giving our children too many attenuated viruses and viral protein fragments before they can be exposed to the real things. I mean, surely nature, which is fluffy and nice and clean and wonderful to all living things would be much more forgiving with its exposure schedule. How well we remember those halcyon days of tooth enamel-destroying fevers and iron lungs. If it weren’t for the fact that “toxins” is sufficiently vague and untestable and unfalsifiable as a complaint–so much so that it’s ubiquitous among woo-woo garbage–I would expect the next antivax meme to be about the “energy” of the vaccines causing autism.

This constant goalpost-shifting is not a hallmark of a scientific hypothesis. It’s not the sign of rational examination of claims or a desire to actually determine whether or not one’s convictions are true. It’s the tactic of the true believer, the unsinkable rubber ducks whose certainty insulates their beliefs from criticism, evidence, and any harsh contact with reality. Good science has invalidated each of their hypotheses in turn, demonstrating that their proposed causal link is borne out of fallacious post-hoc thinking and unscientific ideology. The scientific method is to abandon mistaken hypotheses, not to make them vaguer and less prone to falsification until they lack any explanatory power at all. This is what the antivax crowd has done; this is emphatically not scientific.

Jenny McCarthy trusts her “mommy instinct” and her Google-based research, but neither of these are reliable sources of truth. The Internet is wonderful in that it gives everyone a voice, and terrible in that it lacks any quality control or fact-checking requirement. “Mommy instincts” are great for skinned knees and stormy nights, but they aren’t reliable sources of truth–just ask any geeky kid whose mom says he’s the handsomest boy in his school, or any mom who thinks her college-bound daughter is pure and virginal as the driven snow. If “mommy instinct” were as reliable as Jenny seems to think, then there would be no need for pediatricians.

But she is a celebrity, and so is her boyfriend, and so they have the means and prestige to promote their arrogant, dangerous ignorance to a humongous audience of credulous people, and they are given equal standing with actual scientists, their ignorance pitted against actual evidence as though the two had similar claims to the truth. I’m all for celebrities having and sharing their opinions; what they shouldn’t be doing (and what our media shouldn’t be complicit in allowing them to do) is pretending that their SAG memberships make them authorities on anything more complicated than method acting. I applaud celebrities like Amanda Peet for standing up and giving the side of reason and science a voice, but I deplore a system and a society where the side with the most famous people on it is commonly believed to be the side with the truth.

So go ahead, put your kids at risk for dozens of debilitating, easily preventable diseases by putting your trust in this asshole:That's right, Batman fucking Forever.
Me, I’ll stick to science.

The Good Fight

You may have noticed in the sidebar that I’ve been reading Autism’s False Prophets by Dr. Paul Offit. I’m happy to say that I’ve finished it, and it’s fantastic. The book lays out the autism situation and the battle against the antivaccinationists in great detail, and it’s really well-written to boot. Go out and get a copy of it now–bookstore or library, as long as you read it. You’ll laugh, you’ll get mad, you’ll want to strangle dangerous quacks like Andrew Wakefield, and if you’re like me, you’ll want to send Dr. Offit a letter of thanks afterward.

Mercury Militiaman McCain

I know, I'm shocked at your stupidity too.Apparently John “Million Years War” McCain has decided to divorce himself even further from reality by joining up with the whackjobs and denialists in the “vaccines cause autism” crowd. There’s not a whole lot I can say about how wrong those jackasses are (you can start here if you’re interested), but I have to wonder what would possess John McCain to make such a stupid statement. I mean, I’ve seen him embrace anti-science positions in the past, then reject them when he was more correctly informed (as he did with Darwin several years ago), so it’s possible that the Mercury Militia merely misinformed McCain, and he hasn’t yet found out about their fallacious follies and factual flaccidity.

The other possibility is that he sees some kind of political advantage in this position. How? Is he trying to win the “credulous parent” vote? Is he hoping to steal tinfoil-hat-wearers away from Ron Paul? Could he be courting “arrogant unemployed gamblers” as a significant voting block? Or is he just trying to add to the Republican Party’s ongoing campaign of anti-intellectualism, anti-science sentiment, and unsubstantiated fear?

Oh. Nevermind.