Getting Started
A strong argument is like a sturdy building; it needs a solid foundation. This chapter teaches you how to choose the best foundational materials—your evidence—to construct a convincing and logical argument. Mastering this skill solves a common problem in student writing: using evidence that is merely related to the topic instead of evidence that strategically and powerfully supports a specific claim.
What You Should Be Able to Do
After this lesson, you will be able to:
Select evidence that is directly relevant to the specific claim you are making.
Evaluate whether your evidence is sufficient in both quality and quantity to be convincing.
Choose evidence purposefully to achieve specific effects, such as illustrating a concept or amplifying a point.
Explain how your chosen evidence logically connects to and strengthens your line of reasoning.
Key Moves and Effects
Claim and Thesis
Your thesis is the overarching argument of your entire essay. To prove this thesis, you break it down into smaller, more manageable points called claims, which typically form the topic sentences of your body paragraphs. Every piece of evidence you select must directly support one of these specific claims, thereby helping to build a case for your overall thesis.
Reasoning and Organization
A strong argument is built upon a clear line of reasoning. This is the logical sequence of claims that work together to defend your overarching thesis. Think of it as a chain connecting your introduction to your conclusion; each link is a claim, and the chain is only as strong as its weakest link. Evidence is what forges these links, making them strong and believable. Without carefully chosen evidence, your line of reasoning can fall apart, leaving your reader unconvinced.
Evidence and Commentary
Evidence is the foundation of your argument. It consists of the specific facts, examples, anecdotes, or details you use to support your claims. However, not all evidence is created equal. To be effective, your evidence must meet two key criteria: relevance and sufficiency.
Relevant Evidence
Relevant evidence is information that has a clear and logical connection to the claim it is meant to support. It’s not enough for evidence to be on the same general topic; it must directly prove the specific point you are making in that paragraph. Asking yourself, "Does this piece of information directly help prove this specific claim?" is a crucial step in selecting relevant evidence.
Sufficient Evidence
Sufficient evidence means you have provided enough high-quality support to convince a skeptical reader. Sufficiency is about both quantity and quality.
Quantity: One small example is rarely enough to prove a broad claim. You often need multiple points of data or a more developed example to be persuasive.
Quality: The evidence must be apt and compelling. A detailed, well-explained personal anecdote or a precise historical example is often more powerful than a vague or generic statement.
Purposes of Evidence
Beyond being relevant and sufficient, strong evidence serves a specific purpose within your argument. Writers choose evidence strategically to:
Illustrate: To create a mental picture for the reader, making an abstract idea more concrete.
Clarify: To make a complex or difficult idea easier to understand by providing a clear example.
Exemplify: To offer a specific instance of a broader category or general statement.
Amplify: To add weight, importance, or emotional resonance to a point, showing the reader why it matters.
Associate: To create a connection in the reader’s mind between your idea and another, more familiar or powerful concept.
Set a mood: To evoke a particular feeling (e.g., urgency, sympathy, outrage) that aligns with the argument’s tone and goal.
Data and Organization Tools
A reasoning chain helps you map the logical flow of your argument from a broad claim to the specific evidence that supports it. Use this structure to test the strength of your evidence and commentary before and during the writing process.
Reasoning Chain: From Claim to Thesis
| Element | What it is | Example |
|---|---|---|
| Claim | The specific point of a body paragraph. | In times of crisis, communities often reveal a remarkable capacity for selfless collaboration. |
| Evidence | The specific example, fact, or detail. | During the massive blackout of 2003, stories emerged of neighbors sharing generators, strangers directing traffic, and local restaurants giving away food before it spoiled. |
| Purpose of Evidence | The strategic reason for choosing this evidence. | To exemplify the abstract idea of "selfless collaboration" with concrete actions. |
| Commentary | The explanation of how the evidence proves the claim. | These were not organized relief efforts but spontaneous acts of mutual support, demonstrating that when formal structures fail, a sense of shared responsibility can emerge organically. |
| Connection to Thesis | How this claim and evidence support the overall argument. | This example supports the overarching thesis that human nature is fundamentally cooperative, not just competitive. |
Evidence Bank: Types and Purposes
Use this list to brainstorm different kinds of evidence and to remind yourself of the strategic purpose behind each choice.
Evidence to Illustrate: Using a vivid description to help the reader "see" the concept you are discussing.
Evidence to Clarify: Providing a straightforward example that untangles a complicated idea.
Evidence to Exemplify: Offering a specific, representative case to support a general statement.
Evidence to Amplify: Choosing an example with emotional weight or significant scale to emphasize the importance of your point.
Evidence to Associate: Linking your argument to a well-known event or idea to lend it credibility or context.
Evidence to Set a Mood: Telling a story that creates a tone of urgency, hope, or warning.
Personal Anecdote: A brief story from your own experience. It can be powerful for creating a personal connection and emotional impact.
Historical Event: A specific event from the past used to provide context or demonstrate a pattern.
Current Event: A recent event from the news that can make your argument feel timely and relevant.
Hypothetical Scenario: An invented but plausible situation ("Imagine if...") used to explore potential consequences and clarify a principle.
Skill Snapshots
Here are three examples showing how to connect a claim, evidence, and commentary effectively.
Example 1: Using a Personal Anecdote to Exemplify
Claim: True learning often requires embracing failure as a part of the process.
Evidence: I remember spending a month trying to master a difficult piece on the piano, fumbling the same passage dozens of times until my fingers ached.
Commentary: It was only by analyzing the specific notes I missed each time—by embracing those small, repeated failures—that I was eventually able to play the piece flawlessly. This experience taught me that improvement is not a straight line but a messy cycle of trial, error, and correction.
Example 2: Using a Hypothetical Scenario to Clarify
Claim: Unfettered access to information, while seemingly beneficial, can paradoxically lead to a less-informed public.
Evidence: Imagine a person trying to understand a complex political issue by searching online. They are immediately inundated with thousands of articles, blogs, and videos, many of which offer conflicting facts and biased interpretations.
Commentary: In this scenario, the sheer volume of information becomes a barrier. Instead of achieving clarity, the person is likely to either retreat to sources that confirm their existing biases or simply give up, overwhelmed by the noise. The availability of data does not guarantee understanding.
Example 3: Using a Historical Example to Amplify
Claim: The courage to dissent is a fundamental driver of social progress.
Evidence: When Rosa Parks refused to give up her seat on a Montgomery bus in 1955, she was not just performing an isolated act of defiance; she was challenging the entire legal and social infrastructure of segregation.
Commentary: This single, courageous act amplified the frustrations of millions and catalyzed the Montgomery Bus Boycott, a pivotal moment in the Civil Rights Movement. Parks's dissent demonstrates how one person's refusal to accept injustice can galvanize a movement and ultimately reshape a nation.
Common Misconceptions and Clarifications
Misconception: "More evidence is always better."
- Clarification: The goal is sufficient, not excessive, evidence. A single, well-developed, and thoughtfully explained example is far more effective than a long list of undeveloped, generic examples. Quality and explanation trump sheer quantity.
Misconception: "Any example related to my topic is good evidence."
- Clarification: Evidence must be relevant to the specific claim of the paragraph, not just the general topic of the essay. Always check that your evidence directly supports the sentence it follows.
Misconception: "My evidence speaks for itself."
- Clarification: Evidence never speaks for itself. Your commentary must explicitly explain how and why the evidence supports your claim. This connection, which may seem obvious to you, must be spelled out for your reader.
Misconception: "Personal stories are not formal or academic enough for an argument essay."
- Clarification: A well-chosen personal anecdote can be incredibly powerful. It can provide emotional weight, illustrate a complex point in simple terms, and establish your credibility as a writer. The key is to ensure it is purposeful and clearly connected to the larger claim.
Summary
Choosing the right evidence is a deliberate and strategic act that separates a weak argument from a powerful one. Your goal is to select evidence that is both directly relevant to your claim and sufficient in quality and quantity to be convincing. By thinking about the specific purpose of your evidence—whether it is to illustrate, clarify, amplify, or exemplify your point—you can move beyond simply listing facts and begin building a sophisticated, persuasive, and memorable line of reasoning. This thoughtful selection and explanation of evidence is the true foundation of successful argumentative writing.