Questions: Topic Sentences and Thesis Coordination

Question 1

A student writes this thesis: 'Social media has deepened political polarization by creating echo chambers and enabling the spread of misinformation.' Which topic sentence best demonstrates coordination with this thesis?

• A. Social media has fundamentally changed the way people communicate in the modern era.
• B. Many Americans use social media platforms like Twitter and Facebook on a daily basis.
• C. Algorithmic content feeds reinforce users' existing political beliefs by filtering out contrary viewpoints, creating isolated information environments.
• D. Political polarization has been studied extensively by political scientists since the 1990s.

Answer: (C)

Option C directly advances the 'echo chambers' component of the thesis with a specific, arguable claim about how algorithmic feeds produce them. It does argumentative work the thesis requires. Option A is merely related to social media but makes no claim the thesis needs. Option B provides context but makes no argument. Option D introduces background on polarization without connecting it to social media's role. The test: if Option C's claim were false, the thesis would be weakened. The same cannot be said for the others.

Question 2

You apply the test 'If this paragraph's claim were false, would the thesis fail?' to each body paragraph in an essay. A paragraph that PASSES this test is:

• A. Probably tangential — a strong thesis should be defensible even if any single paragraph fails
• B. Doing logically necessary argumentative work that the thesis requires
• C. Over-coordinated and should be broadened to address ideas beyond the thesis
• D. A sign that the thesis is too narrow and should be revised to be more independent of its paragraphs

Answer: (B)

If removing a paragraph's claim would damage the thesis, that paragraph is earning its place — it is supplying evidence or reasoning that the thesis genuinely depends on. This is the difference between an essay that argues and one that merely accumulates. Tangential paragraphs are those whose claims could be false without the thesis suffering at all. They may add interesting material, but they are not part of the argument's logical structure. The test reveals this distinction precisely.

Question 3

If a topic sentence does not use any of the same words as the thesis, it is not properly coordinated and should be revised.

• T. True
• F. False

Answer: False

Coordination can be explicit (using the thesis's language or structure) or implicit (making a claim that is logically necessary for the thesis to hold). Implicit coordination is valid and often preferable — not every paragraph needs to echo the thesis lexically. What matters is whether the paragraph's claim is argumentatively necessary, not whether it shares vocabulary. A paragraph that develops a necessary sub-claim in different but logically connected terms is well-coordinated.

Question 4

In a well-coordinated essay, reading only the thesis and topic sentences in sequence should reveal the logical skeleton of the argument.

• T. True
• F. False

Answer: True

This is the practical diagnostic the topic describes: if someone read only the thesis and topic sentences, could they see what argument is being built and how each paragraph contributes a distinct part? If yes, coordination is working. If the topic sentences seem unrelated, repetitive, or off-topic from the thesis when extracted this way, coordination has broken down. This 'skeleton test' quickly exposes essays that accumulate related observations without actually building a case.

Question 5

What is the practical test for determining whether a body paragraph is logically coordinated with a thesis, and what does it reveal about paragraphs that fail the test?

Model answer: Ask: 'If this paragraph's claim were false, would the thesis fail?' If yes, the paragraph is doing necessary argumentative work. If no — if the thesis would stand fine without it — the paragraph is probably tangential: related but not logically required. Paragraphs that fail the test may add interesting context, but they are not part of the argument's logical structure and should either be cut or reworked to take on a necessary role.

This test separates essays that argue from essays that merely accumulate. An argument has a logical structure in which each piece is necessary for the conclusion. An accumulation just gathers loosely related observations. The 'remove and see if the thesis fails' test operationalizes this distinction. It also guards against the common error of writing paragraphs that are topically related to the thesis (they're 'about' the same thing) without being argumentatively necessary (the thesis doesn't need them to be true).