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Calling Bullshit

Calling Bullshit

The Art of Skepticism in a Data-Driven World
by Carl T. Bergstrom 2020 336 pages
4.11
4k+ ratings
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Key Takeaways

1. Ubiquitous Bullshit Demands Critical Thinking

The world is awash with bullshit, and we’re drowning in it.

Defining Bullshit. Bullshit is characterized by a blatant disregard for truth, logical coherence, or what information is actually being conveyed, often intended to persuade or impress. It differs from lying, which is a deliberate attempt to deceive, as bullshitters may not even care about the truth. Bullshit can be old-school, using rhetoric and fancy language, or new-school, using math and science to create an impression of rigor.

Origins of Bullshit. Bullshit is not a modern invention, with roots tracing back to ancient sophists and even animal deception. Animals, like mantis shrimp and ravens, use deception for survival, but humans take it to the next level with language and theory of mind.

The Need for Detection. In today's world, adequate bullshit detection is essential for the survival of liberal democracy. Democracy has always relied on a critically thinking electorate, but never has this been more important than in the current age of fake news and international interference in the electoral process via propaganda disseminated over social media.

2. The Internet: Amplifier of Misinformation

The invention of new and various kinds of communication has given a voice and an audience to many people whose opinions would otherwise not be solicited, and who, in fact, have little else but verbal excrement to contribute to public issues.

Democratization and its Dark Side. The internet has democratized information, allowing marginalized voices to be heard and niche communities to form. However, this democratization has a dark side, as amateur writers can reach audiences as large as professional journalists, but often lack the training and incentives to report accurately.

Click-Driven Media. The internet news economy is driven by clicks, prioritizing sensationalism and emotional engagement over quality and accuracy. This has led to an arms race among headlines, with publishers promising emotional experiences rather than conveying facts.

Partisanship and Polarization. Online, mainstream outlets deliver news with a partisan slant, isolating people in echo chambers. Hyperpartisan news sources further distort information, and algorithms amplify content that aligns with users' sociopolitical orientations, suppressing alternative viewpoints.

3. Bullshit Obscures Truth, Not Just Falsity

Bullshit involves language, statistical figures, data graphics, and other forms of presentation intended to persuade or impress an audience by distracting, overwhelming, or intimidating them with a blatant disregard for truth, logical coherence, or what information is actually being conveyed.

Persuasion Over Truth. Bullshit is not merely about falsehood; it's about persuasion or impression management without regard for truth. The speaker aims to manipulate the listener with rhetorical flair, superfluous detail, or statistical snake oil.

The Black Box Analogy. Bullshit often functions like a "black box," shielding claims from scrutiny by using jargon, complex statistics, or sophisticated technology that most people don't understand. This makes it difficult to fact-check and challenge the claims.

Focus on Data and Results. To fight back, focus on the data that goes into the black box and the results that come out. Are the data unbiased, reasonable, and relevant? Do the results pass basic plausibility checks? Do they support the conclusions drawn?

4. Correlation Does Not Equal Causation

Falsehood flies, and truth comes limping after it.

The Trap of Causality. It is human nature to infer that when two things are associated, one causes the other. However, this is a common source of bullshit, as people often take evidence of correlation and try to sell a story about causation without sufficient evidence.

Examples of Misinterpretation. The media often misrepresents correlational studies as causal, such as claiming that exercise lowers cancer risk based on a study that only showed an association. Similarly, the "never-been-kissed" study, which found an association between self-esteem and kissing, does not prove that self-esteem causes kissing or vice versa.

The Importance of Rigorous Analysis. To avoid falling for this fallacy, it is crucial to think critically about the direction of causality, consider alternative explanations, and look for manipulative experiments that can isolate the cause-and-effect relationship.

5. Numbers Can Deceive Without Lying

The amount of energy needed to refute bullshit is an order of magnitude bigger than [that needed] to produce it.

The Illusion of Objectivity. Numbers feel objective, but they are easily manipulated to tell whatever story one desires. They can be presented without context, making it difficult to make meaningful comparisons.

Distorting the Truth. Bullshit often arises either because there are biases in the data that get fed into the black box, or because there are obvious problems with the results that come out. Quantitative evidence generally seems to carry more weight than qualitative arguments. This weight is largely undeserved—only modest skill is required to construct specious quantitative arguments.

The Power of Context. To be transparent, numbers must be placed in an appropriate context. Numbers must presented in a way that allows for fair comparisons.

6. Selection Bias Distorts Reality

The world is awash with bullshit, and we’re drowning in it.

The Problem of Non-Random Samples. Selection bias arises when the individuals sampled for a study differ systematically from the population of individuals eligible for the study. This can lead to misleading conclusions, as the sample is not representative of the larger group.

Examples of Selection Bias. Auto insurance ads that claim "average annual savings over $500" are misleading because only those who save money by switching are likely to switch. Similarly, a study of college students' kissing habits may not be representative of the broader population.

The Importance of Randomization. To avoid selection bias, it is crucial to ensure that the sample is random with respect to the question being asked. In clinical trials, randomizing treatments helps to minimize selection biases and ensure that differences in outcome are due to the treatment, not pre-existing conditions.

7. Data Visualization Can Mislead

The amount of energy needed to refute bullshit is an order of magnitude bigger than [that needed] to produce it.

The Power of Visuals. Data visualizations can help simplify complex information and highlight important ideas. However, they can also be used to distract, confuse, and mislead readers.

Common Tricks. Designers can manipulate axes, use inappropriate chart types, and violate the principle of proportional ink to create a false impression. For example, inverting the vertical axis can make a rise in homicides look like a decline.

The Importance of Critical Evaluation. To avoid being misled, it is crucial to look at the axes, understand the chart type, and consider whether the visualization accurately represents the underlying data.

8. AI and Big Data: Powerful, but Not Infallible

The world is awash with bullshit, and we’re drowning in it.

The Promise and Peril of AI. Machine learning and artificial intelligence have made remarkable progress, but they are not immune to bullshit. The algorithms are basically the same ones invented in the 1950s, and even computational power has started to level off over the past ten years.

Garbage In, Garbage Out. Machine learning algorithms are only as good as the data they are trained on. Biased or flawed training data can lead to biased or flawed results, perpetuating existing inequalities.

The Need for Scrutiny. To call bullshit on AI, it is often sufficient to ask for details about the training data and to consider whether the results are being interpreted appropriately. It is also important to be aware of the limitations of AI and to avoid overhyping its capabilities.

9. Science Is Susceptible to Bullshit

The world is awash with bullshit, and we’re drowning in it.

The Human Element. Science, while a powerful tool for understanding the world, is a human endeavor and is therefore susceptible to biases, errors, and even fraud. Scientists are motivated by curiosity, but also by recognition, funding, and career advancement.

The Replication Crisis. A significant portion of published research findings cannot be reproduced, raising concerns about the reliability of scientific results. This can be attributed to factors such as p-hacking, publication bias, and the base rate fallacy.

The Importance of Skepticism. To navigate the scientific literature, it is crucial to be skeptical, to question the source of information, and to be aware of the potential for bias and error.

10. Spotting Bullshit Requires a Critical Mindset

The world is awash with bullshit, and we’re drowning in it.

Cultivating Habits of Mind. Spotting bullshit requires cultivating appropriate habits of mind, such as questioning the source of information, being aware of unfair comparisons, and thinking in orders of magnitude. It also involves avoiding confirmation bias and considering multiple hypotheses.

The Importance of Source Evaluation. Journalists are trained to ask the following simple questions about any piece of information they encounter: Who is telling me this? How does he or she know it? What is this person trying to sell me?

The Power of Fermi Estimation. Fermi estimation is useful for more than scientific problems. The same approach provides a powerful way to think about social issues.

11. Refuting Bullshit: A Call to Action

The world is awash with bullshit, and we’re drowning in it.

Calling Bullshit as a Performative Utterance. Calling bullshit is not merely reporting disbelief; it is a public act of repudiation. As such, it should be done responsibly, appropriately, and respectfully.

Strategies for Refutation. Effective refutation involves using reductio ad absurdum, finding counterexamples, providing analogies, redrawing figures, and deploying null models. It also requires being clear, pertinent, and charitable.

The Importance of Ethical Engagement. Calling bullshit is crucial to the healthy functioning of a social group, but it should be done with humility, respect, and a focus on the argument, not the person.

Last updated:

Review Summary

4.11 out of 5
Average of 4k+ ratings from Goodreads and Amazon.

Calling Bullshit receives mostly positive reviews for its accessible approach to critical thinking and spotting misinformation. Readers appreciate its timely content, practical examples, and humor. Many find it useful for navigating today's information-heavy world. Some criticize its density or repetitiveness, while others praise its thoroughness. The book is often recommended as essential reading for students and adults alike. Reviewers highlight its insights on data manipulation, scientific publishing, and social media. Overall, it's seen as a valuable guide for developing skepticism in a data-driven society.

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About the Author

Carl T. Bergstrom is a theoretical and evolutionary biologist at the University of Washington. He researches how information flows through biological and social networks. Bergstrom co-authored "Calling Bullshit" with Jevin West, based on their popular undergraduate course of the same name. He is known for his expertise in epidemiology and played a significant role in educating the public during the early stages of the COVID-19 pandemic. Bergstrom's work focuses on applying scientific principles to combat misinformation and improve critical thinking skills. He frequently appears in media to discuss science communication and the spread of information in modern society.

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