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English Composition and Rhetoric Unit 3: Reasoning and argument structure

An argument needs a logical line of reasoning that builds toward the thesis, and it gets stronger when it addresses opposing views.

Covers: Line of reasoning, organization patterns, counterarguments and rebuttals, logical fallacies

Study guide

An argument's line of reasoning is the logical path from claim to claim that leads the reader to accept the thesis. Each paragraph should build on the last, and transitions should show how ideas connect. Reasoning can be deductive, moving from a general principle to a specific conclusion, or inductive, moving from specific examples to a general conclusion.

Organization patterns shape how the reasoning unfolds. Common ones include chronological order, cause and effect, problem and solution, compare and contrast, order of importance (often saving the strongest point for last), and classification. The classical structure for argument includes an introduction, background, the writer's points, a counterargument and its rebuttal, and a conclusion.

Addressing counterarguments makes an argument stronger and more credible. State an opposing view fairly (a concession), then respond with a rebuttal that shows why your position still holds: by refuting it with evidence, showing it's limited, or arguing your view matters more. Ignoring obvious objections weakens ethos.

Logical fallacies are errors in reasoning that weaken arguments. Ad hominem attacks the person instead of the argument. A straw man misrepresents an opponent's view to make it easy to attack. A false dilemma presents only two options when more exist. A slippery slope claims one step will inevitably lead to extreme consequences. Hasty generalization draws a conclusion from too little evidence. Others include the bandwagon appeal (everyone does it), circular reasoning (the claim is its own proof), red herrings (irrelevant distractions), appeals to false authority and post hoc reasoning (assuming that because B followed A, A caused B). Spot them in sources and avoid them in your own writing.

When deciding where a sentence belongs, look for cohesion clues. Pronouns and words like "this," "these," "also" or "such" refer back to something already mentioned, so the sentence must follow it. Each sentence should move from known information to new information. Before choosing or revising a transition, name the relationship between two sentences: claim and example, problem and solution, cause and effect, general and specific, or contrast. The connecting word you choose should match that relationship.

Paragraphs have jobs in an argument. They introduce a problem, give background, present a reason, concede a point, rebut an objection, or call for action. Naming each paragraph's job helps with analyzing an argument and with outlining your own.

Key ideas

• A line of reasoning links each claim to the thesis in a logical order.
• Concession and rebuttal: acknowledge the other side, then answer it.
• Common patterns: cause-effect, problem-solution, compare-contrast, chronological.
• Fallacies weaken arguments: ad hominem, straw man, slippery slope, false dilemma, hasty generalization.
• Transitions show how ideas relate.

Formulas and rules

Common mistakes

• Ignoring the opposing view entirely.
• Using a straw man: arguing against a weaker version of the opposing view.

Words to know

Ad hominem

Attacking the person instead of the argument.

Straw man

Misrepresenting an opponent's view to knock it down easily.

False dilemma

Presenting only two options when more exist.

Slippery slope

Claiming one step will inevitably lead to extreme consequences.

Rebuttal

Answering a counterargument.

Fallacy

An error in reasoning.

Deductive reasoning

From a general principle to a specific conclusion.

Inductive reasoning

From specific examples to a general conclusion.

Concession

Acknowledging a valid point from the other side.

Counterargument

An opposing view addressed in an essay.

Hasty generalization

A conclusion drawn from too little evidence.

Bandwagon appeal

Arguing something is right because many people believe it.

Circular reasoning

Using the claim as its own proof.

Red herring

An irrelevant point that distracts from the issue.

Post hoc fallacy

Assuming that because B followed A, A caused B.

Classical argument structure

Introduction, background, points, counterargument and rebuttal, conclusion.

Organization patterns

Chronological, cause-effect, problem-solution, compare-contrast, order of importance.

Sample practice questions

5 more questions like these, from level 1 to 5, are in the practice set.