Commentary Across a Whole Argument: Study Guide (English Language 3.4)

From paragraph commentary to argument-wide commentary

In Topic 3.1 you learned that commentary connects evidence to a claim. In Topic 3.3 you saw that the order of paragraphs forms a line of reasoning. This topic joins the two. The framework says writers explain their reasoning through commentary that connects chosen evidence to a claim, and that commentary explains the significance and relevance of evidence in relation to the line of reasoning. The final phrase is the new idea: commentary does not only serve the paragraph it sits in. It serves the whole argument.

In practice that means asking three questions of every piece of evidence:

1. What does it show? (explain)
2. How does it support this paragraph’s claim? (relevance)
3. Why does it matter for the thesis and the next step of the argument? (significance)

The first is local; the third looks across the argument.

Relevance and significance

These two words are easy to confuse.

Term	Meaning	Question	Example (thesis: libraries are essential public places)
Relevance	How the evidence relates to the claim of this paragraph.	“Does it bear directly on the point?”	A count of evening visits by teenagers is relevant to the claim that young people rely on evening hours.
Significance	Why the evidence matters to the argument as a whole.	“So what for the thesis?”	The count matters because it shows the library serves people who have nowhere else to go, which is the thesis’s central idea.

A piece of evidence can be relevant and still insignificant (it relates to the paragraph’s claim but does not advance the thesis). Strong writers choose evidence that is both, and they say so in their commentary.

Levels of commentary within an argument

A well-built argument uses commentary at several levels.

Level	Where it appears	What it does	Example
Evidence-level	Right after a quotation, fact or example.	Explains what the evidence shows.	“The count of 140 visits, down from 310, shows that more than half of the evening users have disappeared.”
Paragraph-level	At the end of a paragraph.	Draws the paragraph’s point and ties it to the claim.	“The loss falls on those with no alternative.”
Bridge-level	The end of one paragraph or the start of the next.	Links this claim to the next, showing the path.	“If the damage is concentrated among teenagers, the next question is why they have no alternative.”
Thesis-level	In the conclusion and at key turning points.	Shows how the steps add up to the thesis.	“Taken together, these losses show that the library is not a luxury.”

Using all four keeps the line of reasoning visible from beginning to end.

Techniques for keeping an argument connected

• Recurring key terms. Repeating a central word or idea (“a place to be”, “the cost of delay”) across paragraphs creates a thread that readers can follow.
• Echoing the thesis. In the final sentence of a paragraph, use a phrase from the thesis to show how the paragraph advances it.
• Signposting steps. Phrases such as “The second reason is more serious than the first” tell readers where they are in the path.
• Answering “so what?” repeatedly. After each piece of evidence, ask “So what?” and write the answer. Stop when the answer reaches the thesis.
• Balancing evidence and commentary. In analytical writing a useful rule is that commentary should usually be at least as long as the evidence it explains. A paragraph that is mostly quotation has not done its work.

Avoiding commentary that does not help

Weak habit	Why it fails	Better
Restating (“This shows that the library is important.”)	Adds nothing new.	Explain a particular word or number and its consequence.
Vagueness (“This is very significant.”)	Does not say why.	State the significance: what it changes for the argument.
Overreaching (“This proves libraries are essential everywhere.”)	The evidence cannot carry so much.	Match the strength of the conclusion to the evidence.
Disconnected insight (a clever remark with no link to the claim).	Distracts.	Return to the claim and the thesis.

A public-domain example: Douglass’s commentary on an occasion (1852)

When Frederick Douglass spoke in Rochester on 5 July 1852, he did not simply quote the glories of the Fourth of July. He commented on his own audience’s celebration and used the commentary to advance his claim. He says: “This Fourth [of] July is yours, not mine. You may rejoice, I must mourn.” A few sentences later he adds: “The rich inheritance of justice, liberty, prosperity and independence, bequeathed by your fathers, is shared by you, not by me. The sunlight that brought life and healing to you, has brought stripes and death to me.”

Consider what each sentence does in the line of reasoning of the speech.

• “This Fourth July is yours, not mine.” The pronoun contrast (yours, not mine) makes a claim about relevance: the holiday does not include him.
• “You may rejoice, I must mourn.” The parallel structure shows the significance: the same day has opposite meanings for different people, which prepares his larger argument that the nation’s professed ideals contradict its practice.
• The images of sunlight and “stripes and death” extend the comparison and make it concrete.

Douglass’s commentary does more than explain a quotation. It keeps linking each observation to the question that drives the speech: what, to the slave, is the Fourth of July? Each sentence answers that question a little more fully.

Worked example 1: commentary at four levels (written by Marlbridge)

Here is a short argument with its commentary labelled. The thesis is: The library is not a luxury but the one public place where people without money can belong.

Paragraph 2. Opening hours matter most to those with the fewest alternatives. In the autumn survey, 118 of 200 teenagers said the library was the only quiet place they could work. (Evidence) A quiet room is not a convenience to these students; it is the condition of doing homework at all, which means that every hour the doors are shut is an hour of study taken from them. (Evidence-level commentary) The library’s hours therefore decide whether some pupils can keep up. (Paragraph-level commentary) But if teenagers have no other place, who else does the same? (Bridge-level commentary)

Paragraph 3. Pensioners offer a second answer…

Task. Identify each level of commentary and what it contributes.

Step 1: Evidence. The survey figure is evidence, not commentary.

Step 2: Evidence-level. “A quiet room is not a convenience to these students; it is the condition of doing homework at all.” This explains the figure and gives it relevance: it shows why the survey result bears on the claim that hours matter.

Step 3: Paragraph-level. “The library’s hours therefore decide whether some pupils can keep up.” This draws the paragraph’s conclusion and connects to the topic sentence (“Opening hours matter most to those with the fewest alternatives”).

Step 4: Bridge-level. “But if teenagers have no other place, who else does the same?” This question moves the reader to the next paragraph (pensioners) and shows the argument’s direction: from one group to others.

Step 5: Significance for the thesis. The thesis speaks of “the one public place where people without money can belong”. Each level builds toward that: the teenagers lack a place; the next group will too.

Check. Reading only the commentary (not the evidence) still gives a clear path. That is a sign of strong argument-wide commentary.

Worked example 2: analysing the commentary in a sentence pair

Task. Douglass says, “The rich inheritance of justice, liberty, prosperity and independence, bequeathed by your fathers, is shared by you, not by me.” Explain the significance of this sentence in relation to the larger argument that the nation’s ideals contradict its practice.

Step 1: Identify what the sentence says. A list of national goods (“justice, liberty, prosperity and independence”) is called an “inheritance” that is “shared by you, not by me”.

Step 2: Relevance. The sentence supports the claim of the paragraph, that the holiday does not belong to him. The word “inheritance” suggests something a family passes on. By saying it is “shared by you, not by me”, he shows he is excluded from the family of the nation.

Step 3: Significance for the whole argument. The speech argues that a nation which celebrates liberty while holding people in slavery is inconsistent. This sentence makes the contradiction concrete by listing the very goods the audience prizes, then pointing out that the speaker does not share them.

Step 4: The effect on the audience. The audience hears its own ideals used as evidence against itself. That strengthens the argument because it relies on values the audience already accepts.

Check. The answer uses specific words (“inheritance”, “shared by you, not by me”), distinguishes relevance (to the paragraph’s point) from significance (to the larger argument), and notes the audience effect.

How the exam asks about commentary across an argument

• Reading: how a sentence or paragraph functions in the overall argument; what a writer’s commentary adds to the evidence; which statement best describes the writer’s reasoning.
• Writing: which sentence best explains the significance of evidence; which addition best links two paragraphs; which concluding sentence best ties the paragraph to the thesis.
• Essays: commentary that is specific and linked to the thesis is the most important feature of a high-scoring argument. In the rhetorical analysis essay, your commentary should explain how each choice supports the writer’s larger purpose.

Common misconceptions

• “Commentary belongs only after quotations.” Commentary also appears at the end of paragraphs, between paragraphs and in the conclusion.
• “Relevance and significance are the same.” Relevance links evidence to the paragraph’s claim; significance links it to the whole argument.
• “More commentary is always better.” Commentary must be precise and connected. Filler does not improve an argument.
• “A clever observation is good commentary.” It is good only if it connects to the claim and the thesis.
• “The conclusion should repeat the thesis.” It should show how the argument has developed (see Topic 4.2).
• “If the evidence is strong, commentary is optional.” Even strong evidence needs the writer to say why it matters.

Where this leads

Topic 3.5, Flaws in a line of reasoning, looks at what goes wrong when the commentary or the reasoning fails. Practise with the practice questions and the checklist.