Critical Thinking: Logic, Fallacies, Arguments & Decision-Making

What is Critical Thinking?

Critical thinking is the process of carefully analyzing information, arguments, and ideas to decide what to believe or do. It helps you:

• Avoid being misled by poor reasoning.
• Make better choices in studies, work, and daily life.
• Write stronger essays and answer exam questions accurately.

Why is it important?

• Exams: Many NEB questions ask you to evaluate statements, identify flaws, or compare arguments.
• Life: Helps you avoid scams, fake news, and bad advice.
• Career: Employers value employees who think logically and solve problems well.

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Key Concepts in Critical Thinking

1. Arguments

An argument is a set of statements where one (the conclusion) is supported by others (the premises). Example:

• Premise 1: Smoking causes lung cancer.
• Premise 2: John smokes.
• Conclusion: John may develop lung cancer.

Types of Arguments:

Worked Example: Premise: All birds can fly. A sparrow is a bird. Conclusion: A sparrow can fly. Flaw? No—if all birds could fly (which they can’t, e.g., penguins). This is a false premise.

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2. Logical Fallacies

Fallacies are mistakes in reasoning that make arguments weak. NEB often asks you to identify these!

Common Fallacies:

Worked Example: Statement: "If we legalize marijuana, soon everyone will be high all the time!" Fallacy? Slippery Slope—it assumes one step leads to an extreme outcome without evidence.

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3. Evaluating Evidence

Good critical thinkers check:

1. Source reliability: Is the source trustworthy? (e.g., a scientist vs. a random blog).
2. Bias: Does the source have a hidden agenda?
3. Relevance: Does the evidence actually support the claim?
4. Sufficiency: Is there enough evidence?

Example: Claim: "Eating chocolate causes acne." Weak evidence: "My friend ate chocolate and got pimples." Strong evidence: "A study of 10,000 people found no link between chocolate and acne."

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4. Decision-Making Models

Critical thinking helps in making choices. Two common models:

A. Pros and Cons List

List advantages and disadvantages before deciding. Example: Should I study late or sleep early?

B. Cost-Benefit Analysis

Weigh the costs (money, time, effort) against benefits. Example: Should I buy a new phone?

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Critical Thinking in Writing and Speaking

NEB exams test your ability to:

• Analyze a passage (e.g., "What is the author’s argument?").
• Evaluate claims (e.g., "Is this evidence strong enough?").
• Construct logical arguments in essays.

How to Apply in Essays:

1. State the claim clearly.
2. Provide evidence (facts, examples, data).
3. Address counterarguments (what others might say).
4. Conclude logically.

Example Essay Structure:

Introduction: State the topic and your position.
Body Paragraph 1: Premise 1 + Evidence.
Body Paragraph 2: Premise 2 + Evidence.
Counterargument: "Some say X, but Y proves otherwise."
Conclusion: Restate your position with confidence.

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NEB-Style Practice Questions

Type 1: Identify the Fallacy

Question: "You can’t believe what he says about climate change—he drives a SUV!" Answer: Ad Hominem (attacking the person, not the argument).

Type 2: Evaluate the Argument

Question: "Premise: All athletes are fit. Premise: Ram is an athlete. Conclusion: Ram is fit." Answer:

• Strength: Deductive argument (if premises are true, conclusion must be true).
• Weakness: Premise may be false (some athletes are injured and unfit).

Type 3: Critical Thinking in Context

Question: Read the passage below and answer:

"Social media is harmful because my cousin got depressed after using it." Tasks:

1. What fallacy is used here? (Hasty Generalization)
2. How could the argument be improved?
   • Solution: Use statistical data (e.g., "A 2023 study found X% of teens reported anxiety from social media").

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Exam Tips for Unit 1

1. Spot fallacies first: NEB often asks, "What logical error is here?"
2. Practice analyzing arguments: For any claim, ask:
   • What are the premises?
   • Is the conclusion valid?
   • Are there hidden biases?
3. Use examples: In essays, support claims with real-world evidence (e.g., news, studies).
4. Watch for "weasel words": Words like "some," "many," or "seems" weaken arguments.
   • ❌ "Many people think X" (vague).
   • ✅ "A 2022 survey of 5,000 people found 78% agree with X."
5. Time management: Spend 2–3 minutes per question to identify fallacies or evaluate arguments.

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Real-World Application

Critical thinking isn’t just for exams—use it daily:

• News: Check if a headline matches the article.
• Ads: Do they use emotional appeals instead of facts?
• Social media: Verify sources before sharing.
• Debates: Listen for logical gaps in others’ arguments.

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Summary Checklist

Before finishing a question, ask: ✅ Did I identify all premises and conclusions? ✅ Are there any logical fallacies? ✅ Is the evidence strong and relevant? ✅ Did I address counterarguments?

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Further Practice

1. Find a news article and rewrite it to remove fallacies.
2. Debate a friend on a topic (e.g., "Should school uniforms be banned?") and note fallacies.
3. Solve past NEB papers: Look for questions on "evaluate the argument" or "identify the fallacy."

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Remember: Critical thinking is a skill—the more you practice, the sharper you get! Start by questioning everything, even this note. 😉