10 Common Logical Fallacies Everyone Should Know
Fallacies are errors in reasoning that undermine the credibility of your argument. That is, it renders the argument bad as it distorts the underlying logic. These logical errors are quite common in society and something that many of us encounter regularly. Whether it’s from an influencer trying to capture your attention, a politician wanting your vote, or even a friend trying to convince you of their position, logical fallacies are everywhere. Presented here are ten of the more common logical fallacies that you will encounter.
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Anecdotal Fallacy
An informal fallacy where personal experience or a singular example is used instead of compelling evidence. People often gravitate towards using their own experiences or those of people around them as evidence in arguments. It's natural to do so as citing scientific evidence to craft a good argument takes effort and most of us are lazy thinkers and opt for the quicker and easier…
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Pandemic Endgame: Confronting Covid-19 Vaccine Misinformation
Vaccinations are arguably the greatest medical technology ever created. From the eradication of smallpox to the prevention of certain types of cancers, the success of vaccines is indisputable. The recent COVID-19 vaccines are no less impressive than their numerous predecessors. The leaders in effectiveness are the dual-dose Moderna and Pfizer vaccines, which achieve about 95% effectiveness after two doses, while the single-dose Johnson & Johnson vaccine has a 72% overall efficacy with an 86% efficacy against severe disease. While no vaccine offers 100% protection, they are all recommended to…
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Moving the Goalposts
An informal fallacy that occurs when evidence is presented in response to a specific claim that is subsequently dismissed and greater evidence is then demanded. Or, demanding from an opponent that he/she address more points after the initial counter-argument has sufficiently provided evidence against the primary argument. That is, the requirement for a sufficient rebuttal is continually changed after each counter-argument so as to never be able to
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Media Distrust: Why it's Increasing and What To Do
Over the last two decades, Americans have become more distrustful of traditional media sources. Pejorative terms like “fake news” and “mainstream media” have become particularly common among Americans in the last few years as a way to express frustration with how traditional institutions are reporting the news. Still, two out of three Americans say that the news is very important in holding political leaders accountable. What’s behind the drop in trust and what can…
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The Infodemic and How to Safely Navigate the Information Landscape
It is certainly interesting times that we find ourselves in. Fake news, pervasive science denial, a new conspiracy theory seemingly every week, tens of thousands of unnecessary deaths from the pandemic that could have been easily avoided by acknowledging the recommendations coming from the scientific community, and many more examples. Society is swimming in false information that is literally costing people their lives at this point and driving us apart through polarization [1]. But what can we do? Quite a bit actually…
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9 Steps For Establishing Credibility of Information
Establishing the credibility of information and claims in today’s information-dense world can be challenging. How do you know that information and claims you hear about are worth trusting as accurate? How do you avoid mistakes in your own thinking when deciding if something is true or when deciding on a particular course of action? Critical thinking is a method for…
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False Cause
An informal fallacy where you argue that because event A directly preceded event B, that event A caused event B. That is, because the two events correlate, that this then implies causation. This can also be thought of as a perceived relationship between two things that doesn't necessarily imply that one is the cause of the other. Clearly, this is a flawed position as correlation doesn't always imply causation. However, it is true that…
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How to Identify and Combat Weaponized Disinformation in the Digital Era
The technological revolution, with its explosion of data and far reaching accessibility, has forever changed the way humanity consumes information. Whereas once upon a time, before the days of the World Wide Web, information (along with accessibility) was limited; those days are now long gone. Today, humanity is constantly barraged with digital information. Whether it is the overwhelming surplus of questionable content or clickbait that serves no other purpose than driving traffic for the sake of sales, there’s….
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Black & White Thinking
An informal fallacy where two options or an “either/or” situation is presented when more possibilities exist. This fallacy is ostensibly logical, but, on closer evaluation, it becomes clear that it is indeed sophistry as there exist more than two possibilities than were presented. This type of thinking obfuscates the nuances that accompany most situations in life. That is, in general, life is…
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Baloney Detection Kit
In the news we often hear stories of ‘scientific studies’ which make claims such as: ‘the most addictive food is pizza’, or ‘the MMR vaccine causes Autism’ [1,2]. Those same news outlets will also report on studies that have found new evidence of climate change, or the effects of cannabis on opioid deaths [3]. Often, the same studies are discussed on multiple news outlets regardless of….
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Philosophical Razors
A philosophical razor is a rule that cuts out conclusions that have a low probability of being correct. I use the phrase “low probability” because the nature of a philosophical razor is that it is a rule-of-thumb and not a formal principle. Razors are quite common in…
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Appeal to Authority
A formal fallacy in which it is argued that because a perceived authority figure (or figures) believes a proposition (relevant to their authority) to be true, that proposition must therefore be true. This is also known as….
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Genetic Fallacy
An informal fallacy where a claim is accepted or rejected based on the source of the evidence rather than on the quality of the evidence. The fallacy shifts focus onto the origin in an attempt to…
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Nirvana Fallacy
An informal fallacy where a realistic [insert something, someone, solution, etc. here] is compared to an idealized, unrealistic alternative. This is done in an attempt to….
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The Foundations of Logic
People have been participating in debates since the beginning of time. It is a wonderful tool that humans have developed over the millennia to communicate ideas in hopes of reaching an amicable and constructive conclusion. However, in my experience, individuals who partake in….
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Cherry Picking
An informal fallacy where selected evidence is presented that supports the position of the argument, while contrary evidence is withheld. This is done in an attempt to make the argument more persuasive to an audience. Moreover, the greater the volume or strength of the evidence withheld dictates how….
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Appeal to Nature
An informal fallacy where you argue that because something is “natural” it is therefore good, better, ideal, etc. While it is true that there are things in this world that are considered “natural” and also fall into the “good “ category (e.g., clean air), this isn't always the case (e.g., earthquakes). Naturalness itself doesn't automatically imply good or bad….
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