Spotting Logical Fallacies
in Informational Texts
English 10 LL – Feb 17
What Are Logical Fallacies?
Logical fallacies are errors in reasoning that weaken an argument. They can be intentional (to manipulate readers) or unintentional (due to faulty thinking).
Why Should You Care?
Understanding fallacies helps you become a critical reader and thinker
They appear in news articles, opinion pieces, advertisements, and social media
Recognizing them protects you from being misled or manipulated
Fallacy #1: Ad Hominem Attack
What It Is:
Attacking the person making an argument instead of addressing the argument itself.
Example:
"We shouldn't listen to her climate change proposal because she's not even a scientist."
Why It's Misleading:
The person's credentials or character might be irrelevant to whether their argument is valid. This fallacy distracts from the actual issue by making the discussion about the person rather than the idea. It prevents honest evaluation of evidence and reasoning.
Fallacy #2: False Dilemma
What It Is:
Presenting only two options when more alternatives exist (also called 'either/or' fallacy).
Example:
"Either we ban all video games, or our children will become violent."
Why It's Misleading:
This oversimplifies complex issues by ignoring middle ground or other solutions. It pressures readers to choose between extremes when moderate approaches might be better. Real-world problems usually have multiple possible solutions, not just two.
Fallacy #3: Slippery Slope
What It Is:
Claiming that one small action will lead to a chain of catastrophic events without evidence.
Example:
"If we allow students to redo one assignment, soon they'll expect to redo everything, and academic standards will collapse entirely."
Why It's Misleading:
It uses fear to reject ideas by predicting unlikely worst-case scenarios. The chain of events is presented as inevitable when each step actually requires proof. This fallacy prevents reasonable consideration of policies or changes that might actually be beneficial.
Fallacy #4: Bandwagon Appeal
What It Is:
Arguing that something is true or good simply because many people believe it or do it.
Example:
"Millions of people use this diet plan, so it must be the healthiest way to lose weight."
Why It's Misleading:
Popularity doesn't equal truth or quality. History shows many widely-held beliefs were wrong (like thinking the Earth was flat). This appeals to our desire to fit in rather than encouraging critical thinking. What's popular might be based on marketing, not merit.
Fallacy #5: Hasty Generalization
What It Is:
Drawing a broad conclusion from too little evidence or too few examples.
Example:
"My neighbor's electric car broke down twice, so electric vehicles are unreliable."
Why It's Misleading:
One or two examples don't represent the whole picture. Personal experiences can be biased or coincidental. Reliable conclusions need larger sample sizes and systematic evidence. This fallacy leads to stereotyping and poor decision-making based on limited data.
What It Is:
Citing someone as an expert when they lack relevant credentials in that specific field.
Example:
"This famous actor says we should invest in cryptocurrency, so it must be a smart investment."
Why It's Misleading:
Celebrity doesn't equal expertise. Being skilled in one area doesn't make someone credible in all areas. This exploits our tendency to trust famous people even outside their field of knowledge. Always ask whether the authority has relevant qualifications and expertise.
Fallacy #6: Appeal to False Authority
Your Detective Toolkit
Questions to Ask When Reading
Is the evidence sufficient and relevant?
Does the argument address the issue or attack something else?
Are there other options being ignored?
Is the authority cited actually an expert in this topic?
Remember: Critical thinking means questioning claims and examining evidence, not just accepting what you read!
Become a Critical Thinker
Logical fallacies are everywhere — in ads, politics, social media, and even everyday conversations. Now that you can spot them, you're equipped to think more critically and make better-informed decisions.
Keep questioning. Keep thinking.
AI Acknowledgement
This presentation was created with the help of Claude AI. The following prompt was entered as the starting point: “Act as a high school English teacher. Create a short presentation that walks students through how to find logical fallacies in informational texts. Show examples of the fallacies and why they can be misleading in a text.” The presentation as shown was the 3rd iteration created.
MLA Citation
“Logical fallacies presentation.” Claude.ai, 2026, http://claude.ai. Accessed 13 February 2026.