How Sneaky Words Fool Your Brain — And How to Fight Back

The Woman Who Caught a Famous Scientist Talking Nonsense

In 1937, a famous British scientist wrote something strange. A wooden floorboard, he said, has “no solidity of substance.” When you step on it, you are really stepping on a swarm of flies. If you fall through the floor, that is just a rare coincidence — not a miracle.

Most people read this and felt a shiver of wonder. One woman read it and got angry.

Her name was Susan Stebbing (1885–1943). She was a philosopher. And she thought the scientist was using vivid words to confuse people, not to teach them.

A floorboard with no solidity? That makes no sense, she pointed out. The word “solid” just means being like a floorboard. The sentence cancels itself out. It is like saying “a circle with corners.” But the scientist dressed up this nonsense in exciting images. It sounded deep. It was not.

Stebbing believed something simple but powerful. Unclear language leads to unclear thinking. And unclear thinking makes people easy to fool — by politicians, by advertisers, by anyone with a microphone. She spent her life teaching ordinary people how to fight back.

She was born in North London in 1885. Her father sold fish. She was the youngest of six children. She went to Cambridge University in 1904. At that time, women could study there — but they could not earn actual degrees.

She wanted to study science. Her family said no. They thought her health was too delicate. So she studied history. But at Cambridge, she found a philosophy book by accident. It hooked her. She fell in love with clear thinking.

She earned a master’s degree at King’s College London in 1912. She taught at schools and universities. Then, in 1933, she made national news. She became the first woman in the United Kingdom to be appointed a full professor of philosophy. She was 48. She had fought for respect in a world run by men. She signed her work “L. S. Stebbing” instead of using her first name. She wanted her arguments judged on their merits — not by her gender.

Her whole life, she struggled with serious health problems. She had Ménière’s disease, a disorder of the inner ear. It caused vertigo, terrible headaches, and long stretches of bed rest. Later, she fought cancer. None of it stopped her. She kept working. She also used her own money to help refugees escape Nazi Germany in the late 1930s.

Logic Is Not a Puzzle Game — It’s a Tool for Life

In 1930, Stebbing published a big textbook called A Modern Introduction to Logic. It became the standard guide for a whole generation of philosophy students. But Stebbing was not interested in logic as an abstract game of symbols.

She had her own idea about what logic is really for.

Logic, she said, is directed thinking. It is thinking aimed at answering a question or solving a problem. You start with some facts (called premises). You follow the rules of good reasoning. You arrive at a conclusion. That is logic in action.

She thought of logic as a science, not an art. An art is a set of rules you learn so you can do something — like learning to paint by numbers. But logic, she argued, discovers the real forms that good thinking takes. It is more like anatomy than painting. You are mapping how reasoning actually works.

But here is where things get interesting. By 1934, she had shifted. She wrote a shorter book called Logic in Practice. She now believed that knowing the rules was not enough. You had to practice. You had to build a habit of sound reasoning. And you had to pay close attention to language.

Why? Because language is the tool we think with. And it is full of imperfections.

She wrote that thinking is an activity of the whole personality. You can know every logical rule in the book. You can still reason badly. This is especially true when your passions and beliefs are involved. Sound thinking takes practice. It is like learning an instrument. The theory helps. But you have to play.

Cambridge vs. Vienna — The Fight Over Analysis

In the 1930s, Stebbing stood at the center of a philosophical fight. On one side was the Cambridge School of Analysis. These were British thinkers like G. E. Moore (1873–1958) and Bertrand Russell (1872–1970). On the other side were the logical positivists of Vienna. These included Rudolf Carnap (1891–1970) and Moritz Schlick (1882–1936).

Both sides believed in analysis. That means taking a complicated idea and breaking it into simpler parts. They disagreed about what analysis was supposed to do.

Cambridge philosophers started with things they already knew were true. Take this sentence: “Every economist is fallible.” You understand it. You know it is probably true. Now you analyze it. You ask what makes it true. What facts does it rest on?

The Vienna philosophers wanted to go the other way. Start with perfectly clear definitions. Build everything up from those. If everyday language is vague, replace it with something better — something mathematically precise.

Stebbing belonged to the Cambridge side. But she did something unusual. She invited Carnap to London to give lectures in 1934. She helped organize international conferences. She wanted the two camps to talk to each other instead of ignoring each other.

Her criticism of the positivists was sharp. They want to make everything clear all at once, she said. But philosophy does not work that way. We have to start with what we already know and understand — even if it is a bit vague. Then we clarify it step by step.

Stebbing wrote: “What we ordinarily say, we say unclearly because we think unclearly. It is the task of philosophy to render our thoughts clear.”

She also rejected the positivists’ dismissal of metaphysics — the study of what reality is ultimately like. She believed you could do metaphysics carefully. You just had to analyze the claims you already knew to be true. You did not have to throw them out and start from scratch.

Words as Weapons in Politics and Science

By the late 1930s, Europe was sliding toward war. Stebbing grew alarmed. She was not just worried about armies and dictators. She was worried about how language was being used to manipulate ordinary people.

In 1937, she published Philosophy and the Physicists. Her main target was Sir Arthur Eddington (1882–1944). He was a respected astronomer. He wrote popular books about physics. But Stebbing thought he was misleading his readers.

Eddington used everyday words in bizarre ways. He said a plank has no solidity. He described atoms like a swarm of flies. He made scientific discoveries sound mystical and spooky. This, Stebbing worried, opened the door to fuzzy thinking about religion, spirituality, and truth.

She offered her own plain description of walking into a room. She mentioned blue curtains fluttering in a breeze. A bowl of roses on a table. The hard edge of the table against her leg. The softness of a rose petal. The scent.

Her point was simple. Ordinary language works just fine for ordinary experience. If science needs different language, that is okay. But do not mix them up. Mixing them up does not teach anyone science. It just confuses people.

In 1939, she published her most urgent book: Thinking to Some Purpose. The BBC had asked her to give radio talks. Illness stopped her. She published the talks as a book instead.

She analyzed real political speeches. One of her targets was Stanley Baldwin, a former British prime minister. In a 1931 speech, Baldwin talked about two political parties and their economic views. Liberals, he said, had a bias for free trade. Conservatives had a favour for tariffs.

Stebbing zeroed in on those two words. “Bias” suggests unfair prejudgment, she noted. “Favour” sounds reasonable and open-minded. By choosing different words, Baldwin made one side look closed-minded. He made the other side look fair. And he did it without actually saying so.

This was her core insight. Speakers and writers do not just communicate facts. Their word choices carry hidden assumptions and emotional weight. If you are not paying attention, those choices shape your beliefs. You never even notice it happening.

She urged citizens to read and listen critically. Democracy depends on it, she argued. If voters cannot spot rhetorical tricks, then politicians who rely on the arts of persuasion will always win.

Why Her Fight Is Still Your Fight

Stebbing died of cancer in 1943. She was 57. Her obituaries focused on her work in logic. But something remarkable happened in the decades after her death.

The field of linguistics started catching up with her.

Today, researchers practice something called Critical Discourse Analysis (CDA for short). It does exactly what Stebbing was doing in the 1930s. It examines real speeches, ads, and news articles. It uncovers hidden assumptions and buried ideological messages. The scholars who developed CDA were asking the same questions Stebbing asked. They often reached the same conclusions.

Every time you scroll past a headline designed to make you angry, you are facing the tactics she trained people to spot. Every time a politician says “some people are saying” instead of making a direct claim, the trick is the same. Every time an ad makes you feel bad about yourself so you will buy something — that is precisely the kind of manipulation she warned about.

Stebbing believed that clear thinking was a democratic skill. Not just for philosophers. For everyone. She wrote: “The citizens must be able to think relevantly, that is, to think to some purpose. Thus to think is difficult.”

It is difficult. But Stebbing thought it could be learned. And she spent her life trying to teach it.

Think about it

1. Think of a recent ad or social media post that tried to persuade you. What specific words did it choose? What assumptions were hiding inside those choices?

2. Stebbing said that mixing up ordinary language and scientific language confuses people. Can you think of a case where using everyday words to explain science actually helps? Where is the line?

3. Stebbing believed that spotting manipulative language is a skill democracy needs. Do you agree? What would happen if nobody could do it?