10.5 - Writing Commentary
Understanding commentary in the synthesis essay
Commentary is the analytical core of the synthesis essay, where you explain the significance of the evidence you've chosen from the provided sources. It's not enough to simply present facts, statistics, or quotations; you must interpret how this evidence supports your specific claim within a paragraph and ties back to your overall thesis. Strong commentary demonstrates your ability to think critically about the sources, moving beyond mere summary to offer insightful analysis that advances your argument.
Why commentary matters
- Shows analytical depth - Commentary proves you can interpret evidence, not just repeat it.
- Connects to rubric - The evidence and commentary row of the synthesis essay rubric (worth up to 4 points) rewards clear explanations of how evidence supports your line of reasoning.
- Elevates your score - Thoughtful commentary is often what separates mid-range essays (scoring 2-3) from high-scoring ones (scoring 5-6).
What effective commentary does
- Explains relevance - Clarifies why the evidence matters to your specific claim.
- Analyzes implications - Explores the deeper meaning, assumptions, or limitations of the source material.
- Links to thesis - Ties the evidence back to your overarching argument.
- Engages multiple sources - When possible, shows connections or contrasts between sources to build a nuanced argument.
How to write strong commentary
Writing impactful commentary requires you to go beyond stating what the evidence is and focus on how and why it supports your position. Follow these steps to ensure your commentary is analytical and purposeful.
Steps for crafting effective commentary
Each step builds on the previous one to create comprehensive commentary that demonstrates analytical depth.
Step 1: Introduce the evidence briefly
Provide a short quotation or paraphrase from the source, along with a clear attribution (e.g., "According to Source B"). Keep this concise so you can focus on analysis rather than summary.
Step 2: Explain how the evidence supports your claim
Describe specifically how this piece of evidence relates to the point you're making in the paragraph. Avoid vague statements like "this shows my point"; instead, detail the logical connection between the evidence and your argument.
Step 3: Analyze deeper implications or assumptions
Dig into the source's reasoning. What underlying ideas or assumptions does it rely on? Are there limitations to its perspective that you can point out? This shows critical thinking and adds depth to your analysis.
Step 4: Connect back to your thesis
Reinforce how this evidence and analysis contribute to your overall position. This ensures your commentary remains focused and relevant to the prompt.
Step 5: Link to other sources if applicable
If you're using multiple sources in a paragraph, highlight how they confirm, contradict, or complicate each other. This demonstrates sophistication in handling diverse perspectives.
Quick reference - What to analyze in commentary
| Aspect | What to consider | Example analysis |
|---|---|---|
| Reasoning | How does the source build its argument? | "Source A uses statistical data to argue for policy change, assuming that numbers alone will persuade skeptical readers." |
| Assumptions | What unstated ideas underpin the source? | "This claim in Source C assumes that economic growth always benefits society, ignoring potential environmental costs." |
| Implications | What are the broader effects or consequences? | "By focusing on individual responsibility in Source D, the author implies that systemic issues are less significant, which may limit the argument's scope." |
| Limitations | What weaknesses or gaps exist in the source? | "Source B's reliance on anecdotal evidence weakens its credibility compared to Source A's research-based approach." |
Strategies for linking multiple sources in commentary
In the synthesis essay, you're required to incorporate at least three sources, so showing how they relate to each other within your commentary can strengthen your argument and demonstrate sophistication. Here are ways to connect sources effectively.
Techniques for source integration
Each technique serves a different purpose in building a nuanced argument that engages with multiple perspectives.
Technique 1: Confirmation
- Show how two or more sources agree on a point, reinforcing your claim.
- Example - "Source A's data on rising pollution levels supports Source B's assertion that industrial growth harms the environment, collectively underscoring the urgency of regulatory action."
Technique 2: Contrast
- Highlight differences between sources to address complexity or counterarguments.
- Example - "While Source C argues that technology solves educational disparities, Source D counters that access to technology remains unequal, revealing a critical gap in the proposed solution."
Technique 3: Nuance or qualification
- Use one source to refine or add depth to another, showing a more complex perspective.
- Example - "Source E promotes renewable energy as a complete fix for climate issues, but Source F adds nuance by noting the high initial costs, suggesting that economic barriers must also be addressed."
Common pitfalls in commentary and how to avoid them
Many students struggle with commentary because they fall into traps that limit the depth of their analysis. Recognizing these issues can help you write more effectively.
Frequent mistakes and solutions
| Mistake | Why it's a problem | How to avoid it |
|---|---|---|
| Summarizing instead of analyzing | Restating what the source says without explaining its significance earns minimal points for commentary. | Focus on the "why" and "how" (why does this evidence matter, and how does it support your claim?) |
| Making vague connections | Saying "this supports my point" without specifics leaves your analysis shallow. | Be precise: explain exactly how the evidence ties to your argument (e.g., "This statistic highlights the scale of the issue, persuading readers to support policy reform"). |
| Ignoring source limitations | Failing to critique or question sources misses an opportunity to show critical thinking. | Address potential weaknesses or biases in the source material to add depth to your commentary. |
| Not linking to thesis | Commentary that doesn't connect back to your main argument can seem irrelevant. | Always tie your analysis to the broader position you're defending in the essay. |
| Treating sources in isolation | Discussing sources one at a time without showing connections misses the "synthesis" aspect of the essay. | Compare or contrast sources within your commentary to build a more cohesive argument. |
Worked example - Writing commentary with source connections
Sample prompt and source excerpts
Write an essay that synthesizes material from at least three of the sources provided and develops your position on whether public libraries should adopt digital-only collections.
Sources:
- Source A (excerpt): "Digital collections save libraries significant costs on physical storage and maintenance, allowing funds to be redirected to community programs."
- Source B (excerpt): "Many rural communities lack reliable internet access, making digital-only libraries impractical for a large portion of the population."
- Source C (excerpt): "Digital archives preserve rare texts that would otherwise deteriorate, ensuring wider access to historical knowledge."
Model paragraph with commentary
Below is an example of a body paragraph that incorporates evidence from multiple sources and provides strong commentary.
Public libraries should approach digital-only collections with caution due to accessibility concerns that outweigh some of the financial and preservation benefits. Source A argues that digital collections reduce costs on storage, freeing up funds for community programs, which suggests a practical advantage for library budgets. However, this reasoning assumes universal access to technology, an assumption challenged by Source B, which highlights that many rural areas lack reliable internet, rendering digital-only resources inaccessible to significant populations. This limitation reveals a critical flaw in the push for full digitization, as it risks excluding already underserved communities, thus undermining the library's core mission of equitable access. Furthermore, while Source C notes that digital archives preserve rare texts for broader historical access, this benefit primarily serves those with the means to connect online, again circling back to the access issue raised by Source B. Therefore, while digital options offer undeniable advantages in cost and preservation, the persistent digital divide means libraries must maintain hybrid systems to serve all patrons, aligning with the broader goal of inclusivity in public resources.
Analysis of commentary in this paragraph
- Evidence introduction - Each source is briefly cited with a concise summary of its point (e.g., Source A on cost savings).
- Connection to claim - The commentary explains how Source A's point supports a potential benefit but immediately contrasts it with Source B's limitation, tying both to the paragraph's claim about caution.
- Deeper analysis - It critiques Source A's assumption of universal access and highlights Source B's implication of exclusion, showing critical thinking.
- Source linkage - The paragraph connects Source B and Source C by showing how both relate to the access issue, even though Source C initially seems to support digitization.
- Thesis connection - The analysis ties back to the broader argument for hybrid systems, ensuring relevance to the essay's position.
This kind of commentary would likely score well in the evidence and commentary row of the rubric (3-4 points) due to its consistent explanation of evidence, critical engagement with source limitations, and synthesis of multiple perspectives.