Logical fallacies can show up almost anywhere, but without a clear explanation, they often just leave you with a vague sense that something is off. Here are five common logical fallacies that you may notice in people you interact with (or in yourself) that can seriously hinder personal growth.
Anecdotal Evidence
This is usually manifested as “I know someone” (whose behavior contradicts your general pattern): Using a single personal story or an outlier example to dismiss a broader, proven fact. For example, “Smoking is really bad for your health.” “Nah, my uncle smoked a pack a day, never worked out, and lived to be 95.”
The best way to dismiss them back is actually not as complicated. Call it out and state the idea: You can’t use an outliner to contradict the general truth. Yet, if you feel the need to explain common sense, perhaps just walk away?
Post Hoc Ergo Propter Hoc
This is basically a deduction problem: only because Event A happened before Event B, Event A must have caused Event B. “I started wearing these lucky socks, and then I got a promotion. The socks brought me success.”
Although this one does not exactly focus on the common confusion between correlation and causation, the most effective way is to articulate it by isolating the variables: “Correlation doesn’t equal causation”. Or, sometimes, those instances are not even correlated—Why does wearing socks have anything to do with success?!
Texas Sharpshooter
Similar to the “I know a guy” person, this one leans towards consciously or unconsciously cherry-picking only the data that fits the argument while ignoring all the data that contradicts it. For instance, “This successful CEO dropped out of college, proving that dropping out makes you successful.” You can simply reveal the whole picture. In addition to the golden callout “you can’t use an outliner to contradict general pattern”, here, you can direct the focus to the opposite: “You’re only looking at the rare success stories. What about the percentage of dropouts who don’t succeed?”
Tu Quoque
Defending criticism by turning it back on the accuser, rather than addressing the actual point. This is the classic dialogue where A: “Pirating a movie is wrong.” B: “Oh, please, like you’ve never downloaded a song illegally!” In this case, refocusing on the issue or topic may be the most effective strategy. “Whether or not I have made mistakes doesn’t make the action right. Let’s focus on the topic we’re actually discussing.”
Ad Populum
This may be tied more closely to the belief of collectivism or conformity, but here, the fallacy happens when someone claims that a strategy or mindset must be right because “everyone” is doing it. For instance, “Every top influencer is waking up at 4:00 AM right now, so that’s the only way to be productive.” You can simply point out that, in this context, popularity and effectiveness are two separate concepts.
How to Debate?
If you find yourself having to explain the basics, letting someone “win” so they’ll stop badgering you with twisted logic, or dealing with someone who’s intentionally messing with you, just walk away. No amount of arguing will restore your mental energy, intelligence, or sanity. But if you feel the need to push back, here are some simple, low-key ways to protect your peace.
Question the Logic. Point out what exactly goes wrong. For instance, correlation doesn’t equal causation; an outlier can’t contradict the general truth; popularity doesn’t equal effectiveness, etc. And if you want to continue arguing, redirect the focus back to the topic. Use data and logic, not emotions, personal needs, or social dynamics. But again, only if you think the argument is worth it. (Related: 3 Most Common Logical Fallacies Found in Everyday Conversation)
*What is Daily Insight? An ongoing series of quick, bite-sized brain snacks. Every week, there are three research-based factual reports and three research-informed reflective notes.
