1 Critical Thinking IIe

Critical Thinking — Intermediate

More Tools: Fallacies and Biases

The Bare Essentials level introduced seven logical fallacies and five cognitive biases — enough to begin recognising the most common patterns of flawed reasoning in everyday life. That list was kept short deliberately: the goal at that stage was to build familiarity with the concept and provide immediately useful tools, without overwhelming the introduction.

This page extends that foundation. The fallacies and biases covered here follow the same format as before, and can be learned alongside the Bare Essentials entries or returned to separately. As with the earlier list, these aren’t exhaustive — researchers have catalogued dozens of cognitive biases alone, and new patterns are still being identified. The Further Reading section at the end of this page points to resources for going further, both on the entries covered here and on the many that aren’t.

More Logical Fallacies

Appeal to Nature

What it is: Assuming that something is good, safe, or correct simply because it is natural, or bad and harmful simply because it is artificial or human-made.

Why it’s problematic: The natural world contains arsenic, smallpox, and predation. Human-made things include vaccines, clean water systems, and anaesthesia. Whether something is natural or artificial has no bearing on whether it is beneficial, safe, or true. “Natural” is a description of origin, not a measure of value.

Examples:

“This supplement is completely natural, so it must be safe.” (Many natural substances are toxic; many synthetic ones are lifesaving.)
“That medication is artificial — I’d rather let my body heal naturally.” (The body’s natural response to some conditions, left untreated, is death.)
“Processed food is unnatural, therefore it’s bad for you.” (Processing varies enormously — pasteurisation is processing; so is deep-frying.)

How to spot it: Look for “natural” being used as a synonym for “good” or “safe,” or “artificial/synthetic/processed” being used as a synonym for “bad” or “dangerous,” without any actual evidence about effects being provided.

Note: This fallacy is particularly common in health and wellness contexts, where it is sometimes deliberately exploited — a point covered more fully in the Scam and Manipulation Defense section of this topic.

Appeal to Popularity (Bandwagon)

What it is: Arguing that something is true, correct, or good because many people believe it or do it.

Why it’s problematic: The number of people who hold a belief has no bearing on whether that belief is accurate. Majorities have been wrong throughout history — about the shape of the earth, about who deserves basic rights, about countless medical and scientific questions. Popularity is a social fact, not an evidential one.

Examples:

“Millions of people use this product — it must work.” (Popularity reflects marketing success as much as effectiveness.)
“Everyone knows that’s just how things are.” (Widespread assumption is not the same as demonstrated fact.)
“Most people in this country support this policy, so it must be the right approach.” (Majority preference is relevant to democratic decisions, but not to whether the policy will actually achieve its goals.)

How to spot it: Look for headcounts, popularity, or consensus being offered as the primary reason to believe something, rather than evidence about the thing itself. Phrases like “everyone knows,” “most people agree,” and “you’re the only one who thinks that” are common signals.

Note: This fallacy is worth distinguishing from legitimate appeals to scientific consensus. When scientists overwhelmingly agree on something — climate change, vaccine safety, evolution — that agreement reflects a shared body of evidence and rigorous peer review, not mere popularity. The difference is in how the agreement was reached, not just how many people hold it. Appeal to Authority, covered in the Bare Essentials, is relevant here too — the two fallacies often appear together.

Fundamental Attribution Error

What it is: The tendency to overestimate the role of character or personality in explaining other people’s behaviour, while underestimating the role of situation and circumstance. When someone else does something, we tend to assume it reflects who they are; when we do the same thing, we’re more likely to explain it by the circumstances we were in.

Why it’s problematic: It produces systematically inaccurate judgments of other people, leads to unfair blame, and makes it harder to understand — or change — the situations that actually drive behaviour. If you believe someone failed because of who they are rather than what they were facing, you won’t look for the situational factors that could be addressed. It also tends to make us harsher toward others and more lenient toward ourselves, which connects directly to fairmindedness.

Examples:

Someone cuts you off in traffic and you conclude they’re a reckless, selfish person — rather than considering that they might be rushing to a hospital, or simply didn’t see you.
A colleague misses a deadline and you assume they’re lazy or disorganised, while if you missed a deadline you’d point to the impossible workload you were given.
“People who are homeless just made bad choices” — attributing an outcome almost entirely to character while discounting systemic barriers, economic conditions, and circumstance. (This connects to External Barriers in Level 1.)

How to spot it: Notice when you’re explaining someone’s behaviour purely in terms of what kind of person they are, without considering what situation they were in. A useful check: would you apply the same explanation to your own behaviour in similar circumstances?

Note: As introduced in Psychology — Understanding Others, this bias is one of the most consistent findings in social psychology and operates largely automatically. Understanding the mechanism doesn’t eliminate it, but it creates enough awareness to pause before reaching a character-based judgment. Intellectual empathy, covered in Intellectual Virtues, is the specific habit that most directly counteracts it — genuinely trying to understand someone’s situation before evaluating their behaviour changes what explanations become available.

Tu Quoque (too-kwo-kwee) (Appeal to Hypocrisy)

What it is: Deflecting a criticism by pointing out that the person making it is guilty of the same thing, or has been in the past. From the Latin for “you too.”

Why it’s problematic: Whether the person making an argument is a hypocrite has no bearing on whether their argument is correct. A doctor who smokes can still give accurate advice about the health risks of smoking. A politician who has acted unethically can still make a valid point about ethics in government. The source’s behaviour is a separate question from the truth of the claim.

Examples:

“You’re telling me to exercise more? You barely go to the gym yourself.” (Their fitness habits don’t affect whether the advice is sound.)
“How can you criticise our country’s foreign policy when your country has done the same thing?” (Both can be wrong simultaneously; one wrong doesn’t cancel another.)
“You used to believe the exact same thing — you have no right to criticise it now.” (People are allowed to update their views; past belief doesn’t invalidate current reasoning.)

How to spot it: Look for a criticism being met with a counter-accusation rather than a response to the actual argument. The content of the original claim is never addressed — only the character or behaviour of the person making it. Tu Quoque is closely related to Ad Hominem, covered in the Bare Essentials — both attack the source rather than engaging with the substance.

Note: Pointing out hypocrisy isn’t always irrelevant — if someone is asking you to trust their judgment or follow their example, consistency between their words and behaviour is legitimately relevant to that trust. The fallacy occurs when hypocrisy is used to dismiss an argument rather than to evaluate a person’s credibility or example. As covered in Intellectual Virtues, this is precisely where fairmindedness is tested — the argument deserves evaluation on its own merits regardless of who is making it. A widely recognised variant of this fallacy is whataboutism — particularly common in political discourse — where a criticism is deflected not by addressing it, but by pointing to an unrelated wrongdoing by the critic or their group. The structure is identical to Tu Quoque: the original criticism is never engaged with, only redirected.

Moving the Goalposts

What it is: Changing the criteria for what counts as sufficient evidence or proof after the original criteria have already been met, so that the conclusion can continue to be avoided regardless of what evidence is provided.

Why it’s problematic: It makes a position permanently immune to evidence — not because the evidence is insufficient, but because the standard keeps shifting to ensure it never is. This isn’t careful reasoning; it’s the appearance of reasoning used to protect a predetermined conclusion. It’s a form of intellectual dishonesty that wastes everyone’s effort and prevents genuine inquiry from reaching a resolution.

Examples:

“Show me one study proving this works.” A study is provided. “That’s just one study — show me several.” Several are provided. “Those studies are too small.” Larger studies are provided. “I’d need to see a systematic review.” (The goalposts keep moving rather than the position updating.)
“If you can name one exception to this rule, I’ll reconsider.” An exception is named. “That doesn’t count — it’s a special case.” (The original criterion is abandoned without acknowledgment.)
“Prove you really care about this cause.” Evidence is provided. “That’s not enough — you’d do more if you really cared.” (No amount of evidence will ever satisfy the demand.)

How to spot it: Watch for a pattern where meeting a stated standard is followed immediately by a new, higher standard rather than acknowledgment that the original was met. Also watch for vague standards that can be reinterpreted retroactively — “enough evidence,” “real proof,” “genuine commitment” — which are easy to shift without appearing to.

Note: This fallacy is particularly worth recognising in yourself, not just in others. The pull to move the goalposts on your own beliefs — to keep raising the bar for disconfirming evidence while lowering it for confirming evidence — is a natural expression of confirmation bias. Thoroughness and fairmindedness, covered in Intellectual Virtues, are the specific habits that counteract it.

False Equivalence

What it is: Treating two things as equivalent or comparable when they are meaningfully different in relevant ways — presenting them as if they belong on the same scale when they don’t.

Why it’s problematic: It distorts the relative weight of evidence, severity, or importance by artificially flattening real differences. When genuinely unequal things are treated as equal, it becomes impossible to make accurate comparisons or sound judgments. It’s often used — deliberately or unconsciously — to make a weak position appear as credible as a strong one, or a minor issue appear as serious as a major one.

Examples:

“Scientists disagree about the details of climate change, so there are two valid sides to the debate.” (Disagreement about details within an established scientific consensus is not equivalent to genuine scientific controversy about the core finding.)
“Both candidates have flaws, so they’re essentially the same.” (Treating minor and major flaws as equivalent obscures meaningful differences relevant to the decision.)
“You ate a biscuit on your diet — that’s basically the same as giving up entirely.” (A minor deviation is not equivalent to total abandonment of a goal.)

How to spot it: Look for “both sides” or “it’s the same thing” framing that doesn’t examine whether the two sides are actually comparable in the relevant ways. Ask: are these things genuinely equal in the dimension that matters here, or is the comparison flattening a real difference?

Note: False Equivalence is related to False Dichotomy, covered in the Bare Essentials, but operates differently. False Dichotomy reduces a range of options to two; False Equivalence accepts two options but misrepresents them as equal. Both distort the landscape of a debate, and they frequently appear together. This fallacy is also particularly common in media coverage of contested topics, where the norm of “presenting both sides” can create an artificial impression of equivalence between positions that are not, in fact, equally supported by evidence — a dynamic covered in more depth in Media Literacy.

Motte and Bailey

What it is: Alternating between two versions of a claim — a bold, controversial one (the Bailey) that is the actual position being advanced, and a much more modest, easily defensible one (the Motte) that is retreated to whenever the bold version is challenged. Once the challenge passes, the speaker returns to the Bailey as if nothing happened.

The name comes from a medieval castle design: the Bailey was the desirable but exposed courtyard where people actually lived and worked; the Motte was the defensible hilltop fortification retreated to under attack.

Why it’s problematic: It allows someone to advance a strong claim and enjoy its benefits — persuading people, shaping debate — while avoiding genuine accountability for it. When challenged, they retreat to the safer version and accuse their critic of misrepresentation. When unchallenged, they return to the stronger version. The result is that the bold claim is never honestly defended or honestly abandoned.

Examples:

A person argues that “all conventional medicine is corrupt and designed to keep people sick” (Bailey). When challenged, they say “I just think people should ask questions and do their own research” (Motte). Once the conversation moves on, the original claim reappears.
“This group is destroying society” (Bailey). When challenged: “I just said their policies have negative effects — why are you putting words in my mouth?” (Motte).
“Science is just another belief system, no more valid than any other” (Bailey). When challenged: “I’m just saying scientists are human and can make mistakes” (Motte).

How to spot it: Notice when someone’s position seems to shift significantly under pressure, becoming much more modest or reasonable, and then quietly returns to a stronger form once the pressure passes. Ask: which version of this claim is actually being advanced? Are they the same claim, or are they being treated as interchangeable when they’re not?

Note: This fallacy requires careful handling in conversation. Accusing someone of using it can itself appear uncharitable if the shift in position was genuine rather than tactical — they may have actually updated their view. Intellectual empathy is useful here: try to establish clearly what the person is actually claiming before deciding whether a retreat represents a genuine revision or a tactical one. The Motte and Bailey becomes particularly powerful in the hands of skilled manipulators — it is covered again in the Scam and Manipulation Defense section for that reason.

Interesting Tip: Some of you may notice that this fallacy is similar to the “Bait and Switch” tactic. Here’s how they differ:

Bait and Switch is typically a commercial/sales tactic where you advertise one thing (attractive offer) and then substitute it for something less desirable when the customer arrives. It’s primarily about deceptive substitution in transactions.
Motte and Bailey is specifically about argumentation - alternating between a defensible and indefensible version of a claim to avoid accountability while still advancing the bold version.

They share the core structure of presenting one thing while delivering another, but the contexts and mechanisms differ. Bait and Switch is more about deceptive substitution in offers/transactions, while Motte and Bailey is specifically about argumentative evasion.

Gish Gallop

What it is: Overwhelming an opponent with a large number of arguments, claims, or objections in rapid succession — more than can reasonably be addressed in the time or space available — regardless of the quality or accuracy of those arguments. Named after creationist debater Duane Gish, who used the technique extensively.

Why it’s problematic: It exploits an asymmetry in the effort required to make a claim versus the effort required to refute one. A single false or misleading claim can be stated in a sentence; thoroughly addressing it may require several paragraphs. By flooding a discussion with claims, the Gish Gallop creates the false impression that an unanswered argument is an unanswerable one — when in reality the problem is volume, not validity. It turns debate into an endurance contest rather than a genuine exchange of reasoning.

Examples:

A debater raises fifteen separate objections in a two-minute opening statement, making it impossible for their opponent to address more than two or three in the time allotted. The remaining twelve are later cited as “unanswered.”
An online commenter responds to a single point with a wall of text containing dozens of loosely related claims, links, and assertions, daring the recipient to respond to all of them.
A sales pitch or conspiracy argument strings together so many individually questionable claims that the audience loses track of whether any single one has actually been established.

How to spot it: Look for a sudden dramatic increase in the volume of claims, especially in response to a challenge. Ask: is the quantity of arguments here proportionate to the complexity of the question, or does it feel designed to overwhelm rather than illuminate?

How to respond: You are not obligated to address every claim in a Gish Gallop to have responded adequately. A useful approach is to name what’s happening — “there are too many claims here to address individually, so I’ll focus on the most significant ones” — and then engage seriously with the strongest two or three. This is more honest than either ignoring the technique or exhausting yourself trying to keep pace with it. Intellectual responsibility means engaging in good faith, not matching bad faith point for point.

Note: The Gish Gallop is one of the most common techniques used in deliberate manipulation and online misinformation — it appears frequently in the contexts covered in the Scam and Manipulation Defense section. It also connects directly to Media Literacy: the volume of content in modern information environments functions as a kind of ambient Gish Gallop, making thoroughness and selectivity increasingly important skills.

Sunk Cost Fallacy

What it is: Continuing to invest time, money, effort, or emotional energy into something because of what has already been spent on it, rather than because of its future value or likelihood of success. The “sunk cost” is what has already been spent — and cannot be recovered regardless of what you do next.

Why it’s problematic: Past investment is gone either way. The only rational question is: given where things stand now, is continuing the best use of future resources? Letting sunk costs drive that decision means past mistakes compound into future ones — you end up throwing good money, time, or effort after bad simply because stopping feels like admitting the original investment was wasted.

Examples:

Continuing to watch a film you’re not enjoying because you’ve already paid for it and sat through an hour of it.
Staying in a career, relationship, or project that isn’t working because of how much you’ve already put into it.
Holding onto a failing investment because selling it would mean “locking in” a loss — as if not selling somehow prevents the loss that has already occurred.
“We’ve come this far — we can’t stop now.” (How far you’ve come doesn’t determine whether going further is wise.)

How to spot it: Notice when the primary argument for continuing something is how much has already been invested rather than what continuing will actually achieve. Ask: if I were starting fresh today, with no prior investment, would I still choose this path?

Note: The sunk cost fallacy has a strong emotional component — abandoning something you’ve invested heavily in genuinely feels like loss, and that feeling is real even when the reasoning it produces is flawed. This connects directly to Emotion Management: recognising the emotional pull of sunk costs is part of what allows you to evaluate the decision more clearly. Long-term Thinking, covered in this level, is also directly relevant — the ability to evaluate future outcomes independently of past investment is one of its core applications.

More Cognitive Biases

Hindsight Bias

What it is: The tendency, after learning how something turned out, to believe you knew — or could have known — the outcome all along. Sometimes called the “I knew it all along” effect.

Why it’s problematic: It distorts your memory of what you actually believed before the outcome was known, making past events feel more predictable than they were. This leads to overconfidence in your ability to predict future events, unfair judgment of decisions made under genuine uncertainty, and a failure to learn accurately from experience — because if you “knew it all along,” there’s nothing to learn.

Examples:

After a business fails: “It was obvious from the start that model wasn’t going to work.” (It wasn’t obvious — many similar businesses have succeeded.)
After an election result: “Anyone could see that was going to happen.” (Polls and analysts were genuinely uncertain beforehand.)
After a relationship ends badly: “I always knew something was off about them.” (Memory of early doubts is selectively amplified in light of the outcome.)

How to spot it: Notice when an outcome that was genuinely uncertain beforehand suddenly seems like it was inevitable in retrospect. Ask: what did I actually believe before I knew how this turned out? Would I have bet on this outcome at the time?

Note: Hindsight bias makes it genuinely difficult to learn from experience, because it rewrites the story of what you knew and when. One of the most effective countermeasures is the prediction-tracking practice introduced in Intellectual Virtues — writing down your actual beliefs and confidence levels before outcomes are known gives you an accurate record to compare against, rather than a memory that has been quietly revised. This bias also connects to Intellectual Honesty: accurately representing what you actually knew at the time, rather than what you feel like you should have known, is a direct application of that virtue.

What it is: The tendency to recognise cognitive biases in other people more readily than in yourself — to see clearly how others’ reasoning is distorted while remaining largely unaware of the same distortions in your own thinking.

Why it’s problematic: It creates a false sense of immunity. Someone who is aware of cognitive biases but believes they mostly apply to other people is in some ways more vulnerable than someone who hasn’t encountered the concept at all — they have the vocabulary to identify bias without the humility to apply it inward. It also tends to make people more dismissive of others’ reasoning and more confident in their own, which is precisely the opposite of what bias-awareness should produce.

Examples:

“I try to look at things objectively — it’s other people who let their emotions cloud their judgment.”
Recognising confirmation bias in a political opponent’s reasoning while being unaware of it operating identically in your own.
After learning about the Dunning-Kruger effect, concluding that you are one of the competent people who know what they don’t know — rather than considering that this conclusion itself may be an example of the effect.

How to spot it: Notice when your awareness of biases tends to flow outward — toward other people, other groups, other arguments — more than inward. Ask: when did I last identify a bias operating in my own thinking, specifically? If the answer is rarely or never, that’s informative.

Note: Blind Spot Bias is in some ways the meta-bias — the one that protects all the others. This is why Intellectual Humility, covered in Intellectual Virtues, is placed in the Foundation tier rather than the Advanced one: it’s the precondition for bias awareness to actually work on yourself rather than just on others. Research by Emily Pronin at Princeton, who named and studied this bias extensively, found that even people explicitly trained in recognising cognitive biases showed strong blind spot bias — which is a useful reminder that knowledge of a bias and immunity to it are very different things.

The Halo Effect

What it is: The tendency to let one positive (or negative) trait or impression of a person, organisation, or thing influence your overall judgment of them across unrelated dimensions. A strong positive impression in one area creates a “halo” that makes everything else about them seem better; a strong negative impression creates a corresponding shadow.

Why it’s problematic: It causes unrelated attributes to bleed into each other in ways that aren’t justified by evidence. Decisions about competence, trustworthiness, accuracy, or value end up being shaped by factors — physical attractiveness, confidence, status, brand recognition — that have no logical bearing on the quality being assessed.

Examples:

Assuming a physically attractive person is also more intelligent, competent, or trustworthy than others, without any additional evidence. (Research consistently shows this assumption is common and largely unfounded.)
Trusting a celebrity’s advice on health, finance, or politics because you admire their work in their actual field.
Assuming a product from a brand you respect is high quality without examining it, or dismissing a product from an unfamiliar brand without examination.
Rating a well-written, clearly presented argument as more persuasive than an identical argument presented less elegantly.

How to spot it: Notice when your positive or negative impression of someone in one area is influencing your assessment of them in a completely different area. Ask: what is my actual evidence for this specific quality I’m attributing to them?

Note: The Halo Effect is closely related to Appeal to Authority, covered in the Bare Essentials — both involve letting the perceived status of a source do work that evidence should be doing. The difference is that Appeal to Authority is usually about expertise, while the Halo Effect operates on any kind of positive impression. This bias is widely exploited in advertising and public relations — connecting to the persuasion and manipulation dynamics covered in Media Literacy and the upcoming Scam and Manipulation Defense section.

Framing Effect

What it is: The tendency for the way information is presented — rather than its actual content — to significantly influence how it is understood, evaluated, and acted upon. The same facts, presented differently, can produce opposite responses.

Why it’s problematic: It means that judgments and decisions are being shaped by presentation choices rather than by the substance of the information itself. This happens largely without awareness — most people experience their response as a reaction to the facts, not to the framing. It makes people susceptible to manipulation by anyone who controls how information is presented, and it means that two people looking at identical information can reach very different conclusions simply because they encountered it differently.

Examples:

“This surgery has a 90% survival rate” produces more positive responses than “this surgery has a 10% mortality rate” — despite being identical statements.
“95% fat free” is more appealing than “contains 5% fat” — same product, same facts.
Describing a military action as “surgical strikes” versus “bombing civilian areas” frames the same event very differently.
Loss framing (“you’ll lose £50 if you don’t act”) tends to motivate more strongly than gain framing (“you’ll save £50 if you act”), even when the outcomes are equivalent — a pattern documented extensively by Kahneman and Tversky.

How to spot it: When evaluating any claim or offer, try restating it in a different form and notice whether your response changes. If “90% survival rate” feels meaningfully different from “10% mortality rate,” ask which number you’d want to know if it were your decision — and why the framing affected you when the content didn’t change.

Note: Framing is one of the primary tools of advertising, political communication, and media presentation — and one of the hardest biases to counteract because it operates before conscious evaluation begins. Media Literacy covers how framing functions in news and information specifically. The habit of restating information in multiple forms before responding to it is one of the most practical countermeasures available, and connects directly to the thoroughness and intellectual honesty covered in Intellectual Virtues.

How It Connects

The individual entries above include specific connections to other topics where relevant. This section addresses the broader patterns those entries point toward.

Fallacies and biases are not independent problems. Cognitive biases are often the psychological mechanism that makes logical fallacies work. Confirmation bias makes Moving the Goalposts feel reasonable — of course disconfirming evidence needs to meet a higher standard. The Halo Effect makes Appeal to Authority more persuasive than it should be. Blind Spot Bias is what allows someone to spot a Strawman in an opponent’s argument while using one themselves. Understanding both lists together, rather than separately, gives a more complete picture of how flawed reasoning actually operates.

Intellectual Virtues is the direct companion to this page. Where this page names specific patterns to watch for, Intellectual Virtues develops the habits of mind that make watching for them reliable. Fairmindedness addresses the asymmetric scrutiny that underlies Moving the Goalposts and Confirmation Bias. Intellectual Humility is the specific antidote to Blind Spot Bias. Thoroughness counteracts satisficing that leaves framing effects unexamined. The two pages are designed to work together — tools without virtues are unreliable, and virtues without tools lack specific targets.

Several entries in this page connect forward to the Scam and Manipulation Defense section — particularly Appeal to Nature, Motte and Bailey, Gish Gallop, and the Halo Effect. These aren’t just abstract reasoning errors; they are techniques that can be and are deliberately deployed. Recognising them here as fallacies and biases prepares you to recognise them in the more applied context of deliberate manipulation.

At the Level 3 scale, these patterns operate in organisations and systems as well as in individual reasoning. Organisational Intelligence covers how institutions develop — or fail to develop — the collective equivalent of these habits. Social Change Strategies addresses how fallacies and biases function in public discourse and how they can be countered at a community level. Systems Thinking is relevant too: many of the biases here — Sunk Cost, Hindsight Bias, Framing Effect — are particularly consequential when embedded in systemic decision-making, where their effects compound across time and scale.

Practice Exercises

Comprehension Exercises

Without looking back at the descriptions, write a one-sentence definition of each fallacy and bias covered on this page. Then check your definitions. Which ones did you capture accurately? Which ones did you conflate with something similar?
Several entries on this page are easy to confuse with entries from the Bare Essentials, or with each other. Explain in your own words what makes each of the following pairs distinct:
- False Equivalence vs. False Dichotomy
- Tu Quoque vs. Ad Hominem
- Appeal to Popularity vs. Appeal to Authority
- Halo Effect vs. Appeal to Authority
- Sunk Cost Fallacy vs. Confirmation Bias
For each of the following scenarios, identify which fallacy or bias — from either this page or the Bare Essentials — best describes what’s happening. Some scenarios may involve more than one:
- A politician responds to criticism of their party’s environmental record by pointing out that the opposing party once did something similar.
- A person continues funding a project that has shown no results for two years, primarily because of how much has already been spent.
- After a team loses a match, a commentator says the result was obvious from the start and explains in detail why the losing team was always going to fail.
- A supplement company advertises its product as “100% natural, with no synthetic ingredients.”
- A debater responds to a single criticism with fourteen separate counterpoints in rapid succession.

Reflection Exercises

The sunk cost check. Think of something in your life — a project, a commitment, a habit, a relationship — that you’re continuing partly or largely because of what you’ve already invested in it. Ask honestly: if you were starting fresh today with no prior investment, would you still choose this? You don’t need to act on your answer — just see it clearly.
Hindsight audit. Think of a recent outcome that surprised you — something you didn’t predict. Now notice: does it feel, in retrospect, like you should have seen it coming? Try to reconstruct what you actually believed beforehand, before you knew the result. If you’ve been tracking predictions in your virtue journal, this is a good moment to check your record against your current memory.
Blind spot check. Think of the last time you identified a fallacy or bias in someone else’s reasoning. Now ask: is there anywhere in my own thinking on the same topic where the same pattern might be operating? Be honest — the point of this exercise is precisely that the answer is often yes.
Framing awareness. Think of a belief or preference you hold — a product you like, a position you support, a person you trust. Ask: how was this first presented to me? Was it framed in a way that made a positive response more likely? Would a different framing of the same information have produced a different response?

Application Exercises

Fallacy hunting. Over the next week, pay attention to arguments you encounter — in conversation, in media, in advertising, online. Keep a note of any fallacies or biases you recognise from either this page or the Bare Essentials. Note what the fallacy was, where you encountered it, and how it was being used. At the end of the week, review your list: which patterns appeared most frequently?
Reframe it. Take a claim or offer you’ve encountered recently — an advertisement, a news headline, a statistic — and deliberately restate it in at least two different ways. Notice how your response to it changes depending on the framing. Which framing feels most neutral? Which feels most honest?
Respond to a Gish Gallop. Find a comment, article, or argument that uses a high volume of loosely connected claims — online discussions are a reliable source. Rather than attempting to address every point, identify the two or three most significant claims and draft a response that engages seriously with those while naming the volume problem. Notice how it feels to respond selectively rather than exhaustively.
Sunk cost decision review. Think of an important decision you made in the past year. Write down the reasons you gave for the decision at the time. Now identify which of those reasons were about future value and which were about past investment. Does the balance between them look different on reflection?

Discussion and Partner Exercises

Fallacy and bias spotting. Watch or read a debate, interview, or public discussion together. Afterwards, compare notes: which fallacies and biases did you each identify? Did you notice different things? Were there any you disagreed about — where one of you thought a fallacy was present and the other didn’t? Discussing the disagreements is often more useful than the identifications you agreed on.
The steelman and the fallacy. With a partner, each person takes a position on a topic. The other person’s job is to challenge it — but only using valid reasoning, no fallacies. Afterwards, swap roles. Discuss: how difficult was it to challenge a position without reaching for a fallacy? What does that reveal about how often fallacies substitute for genuine argument?
Framing exercise. Working with a partner, each person takes the same piece of information — a statistic, a news story, a product description — and presents it twice: once framed to produce a positive response, once framed to produce a negative one. Afterwards, discuss: how different did the two versions feel? What does that suggest about how much framing shapes your responses in everyday life?
Sunk cost scenarios. Share a sunk cost scenario with a partner — a real or hypothetical situation where someone is continuing something primarily because of past investment. Take turns arguing for and against continuing. Afterwards, discuss: how difficult was it to argue against continuing? What made it feel emotionally compelling to keep going even when the logic didn’t support it?

1 Critical Thinking IIe

Critical Thinking — Intermediate

More Tools: Fallacies and Biases

More Logical Fallacies

Appeal to Nature

Appeal to Popularity (Bandwagon)

Fundamental Attribution Error

Tu Quoque (too-kwo-kwee) (Appeal to Hypocrisy)

Moving the Goalposts

False Equivalence

Motte and Bailey

Gish Gallop

Sunk Cost Fallacy

More Cognitive Biases

Hindsight Bias

Blind Spot Bias

The Halo Effect

Framing Effect

How It Connects

Practice Exercises

Comprehension Exercises

Reflection Exercises

Application Exercises

Discussion and Partner Exercises

Further Reading

Foundational Resources

Books

For Deeper Study