Logical fallacies are errors in reasoning that undermine the validity of an argument. Recognizing these fallacies is crucial for constructing sound arguments and critically evaluating others’ claims. Below is a list of common logical fallacies, categorized for clarity:
Category | Fallacy | Description | Example |
---|---|---|---|
Relevance Fallacies | Ad Hominem | Attacking the person making the argument rather than the argument itself. | “You can’t trust John’s opinion on climate change because he’s not a scientist.” |
Straw Man | Misrepresenting someone’s argument to make it easier to attack. | “Person A: We should have stricter gun control laws. Person B: Person A wants to take away all our guns and leave us defenseless.” | |
Red Herring | Introducing irrelevant information to distract from the actual issue. | “Why worry about the environment when there are so many people unemployed?” | |
Appeal to Ignorance | Claiming something is true because it hasn’t been proven false, or vice versa. | “No one has proven that aliens don’t exist, so they must be real.” | |
False Dilemma | Presenting two options as the only possibilities when more exist. | “You’re either with us or against us.” | |
Ambiguity Fallacies | Equivocation | Using a word with multiple meanings in different senses within the same argument. | “The sign said ‘fine for parking here,’ so I thought it was okay to park.” |
Amphiboly | Using ambiguous grammar to mislead or misrepresent the truth. | “The professor said on Monday he would give a lecture on drug abuse in the college gym.” (Unclear whether the lecture or drug abuse is in the gym.) | |
Presumption Fallacies | Begging the Question | Assuming the truth of the conclusion within the premises. | “Reading is fundamental because it’s essential.” |
Hasty Generalization | Making a broad generalization based on a small or unrepresentative sample. | “My two friends got food poisoning from that restaurant; it must have terrible hygiene.” | |
False Cause | Assuming that because two events occur together or sequentially, one causes the other. | “Every time I wash my car, it rains. Therefore, washing my car causes rain.” | |
Slippery Slope | Arguing that a small first step will inevitably lead to a chain of related (negative) events. | “If we allow students to redo assignments, next they’ll want to retake entire courses, and eventually degrees will become meaningless.” | |
Circular Reasoning | The conclusion is included in the premise, often reworded. | “I’m trustworthy because I always tell the truth.” | |
Emotional Appeals | Appeal to Emotion | Manipulating emotions to win an argument rather than using valid reasoning. | “Think of the children! We must ban all violent video games.” |
Bandwagon | Arguing that something is true or right because everyone else believes it or does it. | “Everyone is investing in this stock; it must be a good investment.” | |
Appeal to Tradition | Arguing that something is better or correct simply because it is older or traditional. | “We’ve always done it this way, so it must be the best way.” | |
Faulty Analogies | False Analogy | Making a comparison between two things that aren’t truly comparable. | “Employees are like nails; just as nails must be hit on the head to work, so must employees.” |
Authority Fallacies | Appeal to Authority | Asserting that a claim is true because an authority or expert says it is, without other supporting evidence. | “A famous actor says this diet works, so it must be effective.” |
Other Fallacies | Tu Quoque | Dismissing someone’s argument because they are being hypocritical. | “You say smoking is bad, but you smoke too, so your argument is invalid.” |
Composition/Division | Assuming that what’s true for the part is true for the whole (composition), or what’s true for the whole is true for the parts (division). | “Each member of the team is excellent, so the team as a whole must be excellent.” (Composition) / “The team is excellent, so each member must be excellent.” (Division) | |
Appeal to Nature | Arguing that because something is ‘natural,’ it is therefore valid, justified, or good. | “Herbal remedies are natural, so they must be better than synthetic drugs.” | |
Gambler’s Fallacy | Believing that past random events affect the probabilities in future random events. | “I’ve flipped heads five times in a row; the next flip is more likely to be tails.” | |
Middle Ground | Assuming that the middle position between two extremes must be correct. | “Some say the earth is flat, others say it’s round; the truth must be somewhere in between.” | |
No True Scotsman | Making an appeal to purity to dismiss relevant criticisms or flaws of an argument. | “No true Scotsman would put sugar in his porridge.” | |
Loaded Question | Asking a question that contains a presupposition, trapping the respondent. | “Have you stopped cheating on your exams?” (Assumes the person has been cheating.) | |
Appeal to Consequences | Arguing that a belief is false because it implies something you’d rather not believe. | “If we accept that climate change is real, it means we have to change our lifestyle. Therefore, climate change isn’t real.” | |
Personal Incredulity | Asserting that because something is difficult to understand, it’s not true. | “I can’t imagine how humans evolved from single-celled organisms; therefore, evolution is false.” | |
Genetic Fallacy | Judging something as good or bad based on where it comes from or its origins. | “That idea came from a convicted felon, so it must be false.” | |
Appeal to Hypocrisy | Countering criticism with criticism rather than addressing the argument. | “ |