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13 min 48 sec
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A Field Guide to Lies: Critical Thinking with Statistics and the Scientific Method

Shows how to test the numbers, surveys, experts and hunches you meet every day, using quick plausibility checks, simple questions about bias, and a clear picture of how science really builds knowledge.

Table of Content

We run into statistics constantly and tend to trust them because they look official and precise, yet a quick plausibility check with rough arithmetic can show that one does not hold up. That is the opening lesson of A Field Guide to Lies, in which cognitive psychologist and neuroscientist Daniel Levitin teaches readers to test claims instead of absorbing them. A boast of 1,000 sales in a single day, for instance, falls apart as soon as you count the minutes in a working shift.

Levitin’s argument is that every claim, whether a number, a survey, an expert’s statement or your own hunch, was shaped by a person, and a few habitual questions reveal how. He moves from misleading statistics to biased samples, false authorities, the slow way science actually advances, and finally the tricks played by your own pattern-hungry brain. The reward is a short set of questions you can put to any headline, sales pitch or slide deck, and the confidence to ask them out loud.

A bold sales figure sounds official, specific and impressive. A clock and sixty seconds of thought can reveal whether it was even possible, and what its failure tells you about the person quoting it.

A desert with a pleasant average temperature can still put a traveler in danger. The most trusted number in any report often hides the very information you needed before making a decision.

A researcher stops a wide mix of people in a busy city square and feels sure her sample is fair. Levitin shows who she missed, and why almost every poll you read shares her problem.

Confident voices fill every feed, and gaps in the evidence can look like proof of a hidden plot. A few simple checks show whose word deserves weight and when a tidy story is filling holes it has no right to fill.

Almost every week a headline promises a discovery that changes everything. Two common myths about science make those headlines easy to believe, and one kind of study is the best way to check them.

Two friends call just as you were thinking of them, and a salesperson quotes a figure that makes a camera sound essential. The same mental habit makes both feel convincing, and one question takes the air out of each.

What Levitin offers is a change in posture more than a catalogue of lies. Behind every number, survey, expert and hunch stands someone who chose what to count, whom to ask, what to say and how to frame it, and that someone is sometimes you. Lies rarely look like lies. They look like a precise sales figure, a pleasant average temperature or camera footage credited with solving 90 percent of break-ins.

The tools are small enough to use the same day. Before forwarding a startling statistic, spend a minute on rough arithmetic and see whether it could even be possible. When a report leans on an average or a poll, ask for the range and ask who never got counted. When a lone study promises a breakthrough, wait for the meta-analysis that pools many. And when a coincidence feels meaningful, remember all the ordinary days when nothing happened.

None of this calls for cynicism. Levitin wants data read the way a careful scientist reads it, with doubt as a working tool. The person who asks what a number is a percentage of is rarely the one who gets sold something.

About this book

What is this book about?

Headlines quote shocking statistics, feeds share studies described as breakthroughs, and sales pitches arrive full of precise percentages. Most of us accept them because numbers look official and stories feel convincing. Daniel Levitin, a cognitive psychologist and neuroscientist, argues that this trust is misplaced. A person gathered, interpreted and presented every figure, and people make mistakes, choose flattering frames and sometimes lie. Levitin's angle is practical. He gives readers a small set of tools: a rough plausibility check that exposes impossible claims, a habit of asking what an average hides, and three questions that reveal sample, participation and reporting bias in any survey. He then turns to claims made in words, showing how to weigh an authority's credentials, why gaps in evidence do not prove a cover-up, and why science advances by way of thousands of studies that check one another, not by isolated flashes of genius. The final step points inward. Our brains are built to find patterns, which makes coincidences feel meaningful and clever framing feel persuasive. Readers finish with a working method for questioning headlines, reports and sales talk, and for catching their own errors of reasoning too.

Book Information

Rating:

Genre:

Psychology

Topics:

Cognitive Biases, Critical Thinking, Data & Analytics, Misinformation

Publisher:

Penguin Random House

Language:

English

Narrator:

Walter

First published:

September 6, 2016

Pages:

336

Length:

13 min 48 sec

Get the book:

Amazon

Who it's for

  • Professionals weighing business numbers

    Professionals who read reports, dashboards and sales pitches full of numbers they cannot easily check.

  • Students judging sources

    Students learning to judge studies, surveys and sources before citing them.

  • Tired of sharing misinformation

    Anyone tired of sharing headlines that later turn out to be wrong.

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About the Author

Daniel Levitin

Daniel Levitin is a cognitive psychologist, neuroscientist, writer and musician. He is a professor emeritus at McGill University in Montreal and was a founding dean at Minerva University in California. Before turning to science he worked as a session player, sound engineer and record producer, contributing to records involving Stevie Wonder, Steely Dan and Joni Mitchell. His research covers absolute pitch and music cognition, and his books include This Is Your Brain on Music, which has sold more than 1.5 million copies, and Successful Aging.

Ratings & Reviews

Ratings at a glance

4.1

Overall score based on 38 ratings.

What people think

Listeners appreciate the content of this work, with one listener pointing out its lucid breakdown of statistical principles. Furthermore, the guide receives praise for its accessibility, as one listener notes the use of ordinary examples to explain various concepts.

Top reviews

Hiroshi

Ever wonder why every 'expert' on the news seems to be contradicting the last one? Levitin's guide is a fantastic defense against the deluge of misinformation we face every single day on Facebook and Twitter. He uses very relatable, everyday examples to explain how numbers can be massaged to favor almost any viewpoint you want to promote. I especially liked the part about identifying true expertise versus someone just having a fancy degree in an unrelated field. My only real gripe is that it feels like it’s trying to do too much at once, jumping from clinical epidemiology to logical fallacies in a way that feels a bit scattered. Still, the practical tips on evaluating web sources and understanding 'fourfold tables' are things I’ll actually use. It’s definitely a better-than-average entry in the skeptic literature genre.

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Wacharapol

Wow, the chapter regarding the author's decision-making process for his sick dog was worth the price of the book alone. It took all the abstract talk about fourfold tables and Bayesian probability and made it deeply emotional and practical. This isn't just a book about numbers; it's a book about how to make better choices when the stakes are high and the information is muddy. I’ve read a few of these 'skeptic' books lately, and this one stands out because it actually gives you a system to follow. It’s clearly written for a general audience, though it doesn't shy away from some of the more complex statistical hurdles we face. Look, I think this should be required reading for anyone who plans on voting or making medical decisions in the near future. It’s an essential manual for the 21st century.

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Siriporn

The section on average life expectancy was a real eye-opener for me. Most of us just assume 'living longer' means we are all reaching 100, but Levitin clarifies that the average is skewed because fewer children are dying in infancy. It’s a crucial distinction that most people miss when they read headlines about medical breakthroughs or demographic shifts. While the tone can sometimes feel like a dry first-year textbook, the clarity he brings to concepts like bimodal distributions is genuinely helpful for the average reader. I did feel that some of the political examples, particularly those involving Fox News or specific candidates, might date the book a bit too quickly. Nevertheless, the core message about skepticism remains incredibly relevant today. It’s a solid 4-star read for anyone who wants to stop being fooled by flashy graphics and misleading percentages.

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Vipawan

As someone who usually breaks out in a cold sweat when math is involved, I found the breakdown of probability surprisingly approachable. Levitin has a way of taking these cold, hard logical truths and turning them into something you can actually apply to your own life decisions. I was particularly fascinated by the section on 'axis shenanigans'—it’s amazing how a simple change in scale can make a minor fluctuation look like a catastrophic drop. The book does get a bit bogged down in the final third when it pivots to formal logic and induction, but the case studies help pull everything back into focus. It’s a necessary read for the modern era where we are constantly blasted with information that is designed to sell us a specific narrative. I’d recommend it for high schoolers or anyone who wants to sharpen their mental toolkit.

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Leah

After hearing a lot of buzz about this on various skeptic blogs, I decided to see if it lived up to the hype. The book serves as a robust 'field guide' for spotting the subtle ways that data is skewed to suit specific agendas, whether it’s in politics or marketing. I found the discussion on 'conditional probability' particularly enlightening, even if I had to read those paragraphs a few times to fully grasp the math. It’s not a perfect book, as the author’s sly voice sometimes feels a bit condescending toward those he labels as 'conspiratorial.' Still, the core message about the responsibility of professional writers and editors to be gatekeepers of truth is one I can get behind. It’s a dense read at times, but the knowledge gained about 'unknown unknowns' is well worth the effort.

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Talia

Picked this up because I’m tired of being manipulated by misleading charts on social media. Levitin does a great job of demystifying things like bimodal distributions and the difference between correlation and causation. The section on how numbers are collected was a major standout for me because it reminds us that a 'fact' is only as good as the methodology behind it. To be fair, some of the jokes and the 'sly authorial voice' fell a bit flat for me, feeling a little forced at times. And while the information is timely, I worry that the specific references to the 2016 election might make the book feel dated to younger readers in a few years. Regardless, the chapters on identifying expertise and the pitfalls of 'counter-knowledge' are incredibly valuable. It’s a strong 4-star guide that rewards careful reading.

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Suthida

Truth is, we live in an era where 'alternative facts' are everywhere, and this book provides a solid toolkit for filtering the noise. Levitin focuses on the 'utter hopelessness' of people failing to think critically, but he offers a way out through simple, logical steps. I found his explanation of why 'honest people do not need to preface their remarks' to be a very sharp observation on modern communication. The book covers everything from the 'prosecutor's fallacy' to how we interpret risk, and it does so without requiring a degree in mathematics. My only criticism is that the middle section on 'Evaluating Words' feels a bit less rigorous than the heavy statistical focus of the first half. It’s still a fantastic resource for anyone who wants to stop being a passive consumer of information. Definitely worth a spot on your shelf.

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Finn

You could argue this came out at the perfect time given the political climate, but the execution feels a bit dry. Levitin covers everything from 9/11 truthers to the skewed stats used in pharmaceutical ads, yet the narrative lacks a certain 'spark' found in books like Bad Science. It often reads like a manual rather than a compelling argument for critical thinking. To be fair, the breakdown of Bayesian probability was one of the better explanations I’ve encountered, making a difficult concept feel almost intuitive. I appreciated the focus on 'axis shenanigans' and how graphs are manipulated to show trends that don't actually exist in the data. However, the author occasionally skips over deeper nuances to maintain a faster pace, which might frustrate those looking for a truly academic deep dive. It’s useful, but not exactly a page-turner.

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Skylar

Personally, I think this serves as a decent introductory primer, though it doesn't quite replace the classics. While Levitin is clearly an expert in his field, the book feels a bit too much like a collection of anecdotes rather than a cohesive guide to critical thinking. He covers a lot of ground, from Bayesian thinking to the pitfalls of mean versus median, but the transition between these topics can feel jarring. I did enjoy the real-world examples involving medical screens and the legal system, which show how these abstract concepts have life-or-death consequences. However, some sections felt like they were just skimming the surface of much more complex issues. If you’ve already read The Half-life of Facts or similar titles, you might find this a bit repetitive. It’s a good starting point for a novice, but maybe not for a seasoned skeptic.

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Teng

Not what I expected from a guy who claims to be teaching us how to think scientifically. I was initially impressed when he corrected the common misconception about life expectancy early on, but then he turned around and used that same flawed logic later in the book! How can a professional writer be so careless with the very principles he is supposedly championing? It makes the entire premise feel a bit hopeless if even the 'gatekeepers of information' can't keep their own arguments straight. There's a lot of focus on 'counter-knowledge' and conspiracy theories, but the writing style is shambolic and inconsistent. Frankly, you’re much better off reading How to Lie with Statistics or something by Ben Goldacre if you want a coherent education in data literacy. This was a massive disappointment for me.

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Questions about this book

Daniel Levitin argues that statistics, surveys and expert claims feel trustworthy because they look precise, but a person shaped every one of them, and people make mistakes or mislead. He gives readers simple habits for testing claims: rough plausibility checks, questions about who was sampled, checks on an authority’s credentials, a realistic view of how science progresses, and awareness of the brain’s tendency to see patterns that are not there.

It is a quick piece of rough arithmetic that asks whether a claim could even be true. Levitin’s example is a salesperson said to have made 1,000 sales in one day. If each sale takes at least a minute, an eight-hour day without breaks allows at most 480. The claim fails before you need any outside data, which tells you to doubt its source.

He describes three. Sample bias comes from how people are chosen, as when a survey in a busy city square misses people who are sick, caring for small children or working nights. Participation bias comes from who agrees to answer. Reporting bias is the gap between what people think and what they will tell a stranger, such as inflating or hiding their income.

When a figure in a presentation surprises you, estimate its realistic limits before accepting it. When someone cites an average, ask for the range, since averages can hide furious customers or wide pay gaps. When a percentage sounds impressive, ask what it is a percentage of, as Levitin shows with a security salesperson whose 90 percent claim shrinks to about 27 percent.

Because science advances through thousands of studies checked against each other, not through sudden single breakthroughs. A meta-analysis combines results from many studies to see whether they agree. When a dramatic new finding hits the headlines, Levitin suggests looking for a meta-analysis on the same question as the best way to separate a genuine advance from one overhyped result.

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