The Baloney Detection Kit: Carl Sagan's Rules for Bullshit-Busting and Critical Thinking
The Baloney Detection Kit: Carl Sagan's Rules for Bullshit-Busting and Critical Thinking
By Maria Popova / brainpickings.org
Aug 11, 2014

Necessary cognitive fortification against propaganda, pseudoscience, and general falsehood.

Carl Sagan was many things — a cosmic sage, voracious reader, hopeless romantic, and brilliant philosopher. But above all, he endures as our era’s greatest patron saint of reason and common sense, a master of the vital balance between skepticism and openness. In The Demon-Haunted World: Science as a Candle in the Dark (public library) — the same indispensable volume that gave us Sagan’s timeless meditation on science and spirituality, published mere months before his death in 1996 — Sagan shares his secret to upholding the rites of reason, even in the face of society’s most shameless untruths and outrageous propaganda.

In a chapter titled “The Fine Art of Baloney Detection,” Sagan reflects on the many types of deception to which we’re susceptible — from psychics to religious zealotry to paid product endorsements by scientists, which he held in especially low regard, noting that they “betray contempt for the intelligence of their customers” and “introduce an insidious corruption of popular attitudes about scientific objectivity.” (Cue in PBS’s Joe Hanson on how to read science news.) But rather than preaching from the ivory tower of self-righteousness, Sagan approaches the subject from the most vulnerable of places — having just lost both of his parents, he reflects on the all too human allure of promises of supernatural reunions in the afterlife, reminding us that falling for such fictions doesn’t make us stupid or bad people, but simply means that we need to equip ourselves with the right tools against them.

Through their training, scientists are equipped with what Sagan calls a “baloney detection kit” — a set of cognitive tools and techniques that fortify the mind against penetration by falsehoods:

The kit is brought out as a matter of course whenever new ideas are offered for consideration. If the new idea survives examination by the tools in our kit, we grant it warm, although tentative, acceptance. If you’re so inclined, if you don’t want to buy baloney even when it’s reassuring to do so, there are precautions that can be taken; there’s a tried-and-true, consumer-tested method.

But the kit, Sagan argues, isn’t merely a tool of science — rather, it contains invaluable tools of healthy skepticism that apply just as elegantly, and just as necessarily, to everyday life. By adopting the kit, we can all shield ourselves against clueless guile and deliberate manipulation. Sagan shares nine of these tools:

  1. Wherever possible there must be independent confirmation of the “facts.”
  2. Encourage substantive debate on the evidence by knowledgeable proponents of all points of view.
  3. Arguments from authority carry little weight — “authorities” have made mistakes in the past. They will do so again in the future. Perhaps a better way to say it is that in science there are no authorities; at most, there are experts.
  4. Spin more than one hypothesis. If there’s something to be explained, think of all the different ways in which it could be explained. Then think of tests by which you might systematically disprove each of the alternatives. What survives, the hypothesis that resists disproof in this Darwinian selection among “multiple working hypotheses,” has a much better chance of being the right answer than if you had simply run with the first idea that caught your fancy.
  5. Try not to get overly attached to a hypothesis just because it’s yours. It’s only a way station in the pursuit of knowledge. Ask yourself why you like the idea. Compare it fairly with the alternatives. See if you can find reasons for rejecting it. If you don’t, others will.
  6. Quantify. If whatever it is you’re explaining has some measure, some numerical quantity attached to it, you’ll be much better able to discriminate among competing hypotheses. What is vague and qualitative is open to many explanations. Of course there are truths to be sought in the many qualitative issues we are obliged to confront, but finding them is more challenging.
  7. If there’s a chain of argument, every link in the chain must work (including the premise) — not just most of them.
  8. Occam’s Razor. This convenient rule-of-thumb urges us when faced with two hypotheses that explain the data equally well to choose the simpler.
  9. Always ask whether the hypothesis can be, at least in principle, falsified. Propositions that are untestable, unfalsifiable are not worth much. Consider the grand idea that our Universe and everything in it is just an elementary particle — an electron, say — in a much bigger Cosmos. But if we can never acquire information from outside our Universe, is not the idea incapable of disproof? You must be able to check assertions out. Inveterate skeptics must be given the chance to follow your reasoning, to duplicate your experiments and see if they get the same result.

Just as important as learning these helpful tools, however, is unlearning and avoiding the most common pitfalls of common sense. Reminding us of where society is most vulnerable to those, Sagan writes:

In addition to teaching us what to do when evaluating a claim to knowledge, any good baloney detection kit must also teach us what not to do. It helps us recognize the most common and perilous fallacies of logic and rhetoric. Many good examples can be found in religion and politics, because their practitioners are so often obliged to justify two contradictory propositions.

He admonishes against the twenty most common and perilous ones — many rooted in our chronic discomfort with ambiguity — with examples of each in action:

  1. ad hominem — Latin for “to the man,” attacking the arguer and not the argument (e.g., The Reverend Dr. Smith is a known Biblical fundamentalist, so her objections to evolution need not be taken seriously)
  2. argument from authority (e.g., President Richard Nixon should be re-elected because he has a secret plan to end the war in Southeast Asia — but because it was secret, there was no way for the electorate to evaluate it on its merits; the argument amounted to trusting him because he was President: a mistake, as it turned out)
  3. argument from adverse consequences (e.g., A God meting out punishment and reward must exist, because if He didn’t, society would be much more lawless and dangerous — perhaps even ungovernable. Or: The defendant in a widely publicized murder trial must be found guilty; otherwise, it will be an encouragement for other men to murder their wives)
  4. appeal to ignorance — the claim that whatever has not been proved false must be true, and vice versa (e.g., There is no compelling evidence that UFOs are not visiting the Earth; therefore UFOs exist — and there is intelligent life elsewhere in the Universe. Or: There may be seventy kazillion other worlds, but not one is known to have the moral advancement of the Earth, so we’re still central to the Universe.) This impatience with ambiguity can be criticized in the phrase: absence of evidence is not evidence of absence.
  5. special pleading, often to rescue a proposition in deep rhetorical trouble (e.g., How can a merciful God condemn future generations to torment because, against orders, one woman induced one man to eat an apple? Special plead: you don’t understand the subtle Doctrine of Free Will. Or: How can there be an equally godlike Father, Son, and Holy Ghost in the same Person? Special plead: You don’t understand the Divine Mystery of the Trinity. Or: How could God permit the followers of Judaism, Christianity, and Islam — each in their own way enjoined to heroic measures of loving kindness and compassion — to have perpetrated so much cruelty for so long? Special plead: You don’t understand Free Will again. And anyway, God moves in mysterious ways.)
  6. begging the question, also called assuming the answer (e.g., We must institute the death penalty to discourage violent crime. But does the violent crime rate in fact fall when the death penalty is imposed? Or: The stock market fell yesterday because of a technical adjustment and profit-taking by investors — but is there any independent evidence for the causal role of “adjustment” and profit-taking; have we learned anything at all from this purported explanation?)
  7. observational selection, also called the enumeration of favorable circumstances, or as the philosopher Francis Bacon described it, counting the hits and forgetting the misses (e.g., A state boasts of the Presidents it has produced, but is silent on its serial killers)
  8. statistics of small numbers — a close relative of observational selection (e.g., “They say 1 out of every 5 people is Chinese. How is this possible? I know hundreds of people, and none of them is Chinese. Yours truly.” Or: “I’ve thrown three sevens in a row. Tonight I can’t lose.”)
  9. misunderstanding of the nature of statistics (e.g., President Dwight Eisenhower expressing astonishment and alarm on discovering that fully half of all Americans have below average intelligence);
  10. inconsistency (e.g., Prudently plan for the worst of which a potential military adversary is capable, but thriftily ignore scientific projections on environmental dangers because they’re not “proved.” Or: Attribute the declining life expectancy in the former Soviet Union to the failures of communism many years ago, but never attribute the high infant mortality rate in the United States (now highest of the major industrial nations) to the failures of capitalism. Or: Consider it reasonable for the Universe to continue to exist forever into the future, but judge absurd the possibility that it has infinite duration into the past);
  11. non sequitur — Latin for “It doesn’t follow” (e.g., Our nation will prevail because God is great. But nearly every nation pretends this to be true; the German formulation was “Gott mit uns”). Often those falling into the non sequitur fallacy have simply failed to recognize alternative possibilities;
  12. post hoc, ergo propter hoc — Latin for “It happened after, so it was caused by” (e.g., Jaime Cardinal Sin, Archbishop of Manila: “I know of … a 26-year-old who looks 60 because she takes [contraceptive] pills.” Or: Before women got the vote, there were no nuclear weapons)
  13. meaningless question (e.g., What happens when an irresistible force meets an immovable object? But if there is such a thing as an irresistible force there can be no immovable objects, and vice versa)
  14. excluded middle, or false dichotomy — considering only the two extremes in a continuum of intermediate possibilities (e.g., “Sure, take his side; my husband’s perfect; I’m always wrong.” Or: “Either you love your country or you hate it.” Or: “If you’re not part of the solution, you’re part of the problem”)
  15. short-term vs. long-term — a subset of the excluded middle, but so important I’ve pulled it out for special attention (e.g., We can’t afford programs to feed malnourished children and educate pre-school kids. We need to urgently deal with crime on the streets. Or: Why explore space or pursue fundamental science when we have so huge a budget deficit?);
  16. slippery slope, related to excluded middle (e.g., If we allow abortion in the first weeks of pregnancy, it will be impossible to prevent the killing of a full-term infant. Or, conversely: If the state prohibits abortion even in the ninth month, it will soon be telling us what to do with our bodies around the time of conception);
  17. confusion of correlation and causation (e.g., A survey shows that more college graduates are homosexual than those with lesser education; therefore education makes people gay. Or: Andean earthquakes are correlated with closest approaches of the planet Uranus; therefore — despite the absence of any such correlation for the nearer, more massive planet Jupiter — the latter causes the former)
  18. straw man — caricaturing a position to make it easier to attack (e.g., Scientists suppose that living things simply fell together by chance — a formulation that willfully ignores the central Darwinian insight, that Nature ratchets up by saving what works and discarding what doesn’t. Or — this is also a short-term/long-term fallacy — environmentalists care more for snail darters and spotted owls than they do for people)
  19. suppressed evidence, or half-truths (e.g., An amazingly accurate and widely quoted “prophecy” of the assassination attempt on President Reagan is shown on television; but — an important detail — was it recorded before or after the event? Or: These government abuses demand revolution, even if you can’t make an omelette without breaking some eggs. Yes, but is this likely to be a revolution in which far more people are killed than under the previous regime? What does the experience of other revolutions suggest? Are all revolutions against oppressive regimes desirable and in the interests of the people?)
  20. weasel words (e.g., The separation of powers of the U.S. Constitution specifies that the United States may not conduct a war without a declaration by Congress. On the other hand, Presidents are given control of foreign policy and the conduct of wars, which are potentially powerful tools for getting themselves re-elected. Presidents of either political party may therefore be tempted to arrange wars while waving the flag and calling the wars something else — “police actions,” “armed incursions,” “protective reaction strikes,” “pacification,” “safeguarding American interests,” and a wide variety of “operations,” such as “Operation Just Cause.” Euphemisms for war are one of a broad class of reinventions of language for political purposes. Talleyrand said, “An important art of politicians is to find new names for institutions which under old names have become odious to the public”)

Sagan ends the chapter with a necessary disclaimer:

Like all tools, the baloney detection kit can be misused, applied out of context, or even employed as a rote alternative to thinking. But applied judiciously, it can make all the difference in the world — not least in evaluating our own arguments before we present them to others.

The Demon-Haunted World is a timelessly fantastic read in its entirety, timelier than ever in a great many ways amidst our present media landscape of propaganda, pseudoscience, and various commercial motives. Complement it with Sagan on science and “God”.

 

Check out Brain Pickings for more gems like this.

4.0 ·
2
Trending Today
The Top 100 Documentaries We Can Use to Change the World
Films For Action · 20,256 views today · A more beautiful, just and sustainable world is possible. Take this library and use it to inspire global change!
Obama's Hidden Role in Worsening Climate Change
Stansfield Smith · 2,990 views today · It should be a scandal that leftists-liberals paint Trump as a special threat, a war mongerer – not Obama who is the first president to be at war everyday of his eight years...
John Lennon's "Imagine," Made Into a Comic Strip
John Lennon. Art by Pablo Stanley · 2,008 views today · This is easily the best comic strip ever made.  Pabl
Today I Rise: This Beautiful Short Film Is Like a Love Poem For Your Heart and Soul
4 min · 1,124 views today · "The world is missing what I am ready to give: My Wisdom, My Sweetness, My Love and My hunger for Peace." "Where are you? Where are you, little girl with broken wings but full...
Make The Serengeti Great Again | Resource Scarcity, Demagogues and How Creativity Can Trump Hate (2017)
5 min · 532 views today · A Familiar Tale of Resource Scarcity, Demagogues, and How Creativity Can Trump Hate A quick, original, illustrated allegory that pokes at the demagogues we’ve got with an...
How Mindfulness Empowers Us
2 min · 495 views today · Many traditions speak of the opposing forces within us, vying for our attention. Native American stories speak of two wolves, the angry wolf and the loving wolf, who both live...
Deconstructing Hierarchies: On Contrived Leadership and Arbitrary Positions of Power
Colin Jenkins · 451 views today · Bosses don't grow on trees. They don't magically appear at your job. They aren't born into their roles. They are created. They are manufactured to fulfill arbitrary positions...
Baraka (1992)
97 min · 382 views today · Featuring no conventional narrative, this film presents footage of people, places and things from around the world. From chaotic cities to barren wilderness, the movie takes...
"Desert Goddess" Remembers Arizona's Glen Canyon
7 min · 368 views today · In this excerpt from the award-winning documentary DamNation, filmmakers Ben Knight and Travis Rummel interview the "desert goddess," Katie Lee. When the Glen Canyon Dam was...
Dinosaur explains Trump policies better than Trump!
8 min · 315 views today · Donald Trump is actually the corporate triceratops, Mr. Richfield, from the 90's TV show sitcom, "Dinosaurs". 
Why It's Crucial for Women to Heal the Mother Wound
Bethany Webster · 272 views today · The issue at the core of women’s empowerment is the mother wound
What Is a Gift Economy? - Alex Gendler
4 min · 247 views today · What if, this holiday season, instead of saying "thank you" to your aunt for her gift of a knitted sweater, the polite response expected from you was to show up at her house in...
Introversion Is Not a Personality Fail
Cat Elz · 228 views today · A few years ago, I got into an argument with my now mother-in-law over my supposedly “backwards” ways. My transgression? I did not attend a party of my now husband’s (then...
HUMAN (2015)
382 min · 226 views today · What is it that makes us human? Is it that we love, that we fight? That we laugh? Cry? Our curiosity? The quest for discovery?  Driven by these questions, filmmaker and artist...
The White Man in That Photo
Riccardo Gazzaniga · 224 views today · Sometimes photographs deceive. Take this one, for example. It represents John Carlos and Tommie Smith’s rebellious gesture the day they won medals for the 200 meters at the...
Defiance in the Face of Oppression - Iranian Artist Atena Farghadani Defends the Right to Draw
Gavin Aung Than · 215 views today · Atena Farghadani is a 28-year-old Iranian artist. She was recently sentenced to 12 years and 9 months in prison for drawing a cartoon.  
Here's How We're Going to End Factory Farming
2 min · 198 views today · Factory farming is a huge problem. But the solution is simple, if you'll join us. Watch this short 2 minute video to see how... Help make a kinder world possible...
Bertrand Russell & Buckminster Fuller on Why We Should Work Less, and Live & Learn More
Josh Jones · 197 views today · Why must we all work long hours to earn the right to live? Why must only the wealthy have a access to leisure, aesthetic pleasure, self-actualization…? Everyone seems to have...
Trump Is a Symptom of a Sickness That Is Raging All Across The World
1 min · 174 views today · This is why we are here. And this is what we need to remember. 
Schooling the World (2010)
66 min · 169 views today · If you wanted to change an ancient culture in a generation, how would you do it? You would change the way it educates its children. The U.S. Government knew this in the 19th...
Load More
What's Next
Like us on Facebook?
The Baloney Detection Kit: Carl Sagan's Rules for Bullshit-Busting and Critical Thinking