Evaluating arguments in non-fiction
Evaluate arguments and claims in non-fiction texts. Assess whether reasoning is sound and evidence is relevant and sufficient. Distinguish between fact and opinion, and recognise bias, propaganda, and rhetorical techniques.
What a learner can do afterwards
- Identify the main claim in an argument text and evaluate whether the evidence presented is sufficient
- Spot logical fallacies or irrelevant evidence introduced to distract from weak reasoning
- Compare two opposing arguments on the same issue and evaluate which is more convincing, with reasons
1 · Read
You have used evidence to support ideas about texts. In an argument, the claim is the point the writer wants you to accept. It may recommend an action or say something is true. A reason explains why. In 'We should repair the uniforms because their seams are torn,' repair is the claim; torn seams are the reason.
Relevant evidence supports the exact claim. Blocking sunlight supports a claim about shade; liking trees supports enjoyment, not shade. One person's preference may matter but cannot show a policy's effects on everyone. A true fact helps only if it connects to the claim. Unrelated details add no support, but they do not erase relevant evidence in the same argument.
Check who a survey includes and what it measures. Class reports about focus describe that class's views, not measured focus or the whole school's views. A food choice may suggest a preference, not a request for increased supply. One choice cannot establish most people's preferences. Evidence can be relevant but insufficient. One event shows what happened once, not a rule for 'all' cases or what 'always' happens.
Comparing capacity with demand shows need: 6 dry seats for 15 people means a shortage. Another town's shelter does not show this shortage. Observations or trials give more direct support than unsupported predictions. Reported stress ratings describe people's reports, not direct measurements of stress or proof of a cause. Check what was measured, who was included, and how results were collected. Naming a study is not enough.
An ad hominem attack rejects an idea through an unrelated personal criticism. A coach's tie cannot show whether uniforms need replacing. Answer the stated objection: moving a club meeting after lessons addresses a timetable clash. Training in the subject can help you judge technical advice; an unrelated hobby does not establish expertise. Expertise does not guarantee accuracy, so check the evidence and reasoning too.
A bandwagon fallacy treats popularity as proof that an idea is correct or a product is good. Supporters show popularity, not merits. Define a quality claim before testing it: if 'best' means longest-lasting, compare how long products last under similar conditions. Sales totals do not directly measure durability.
When arguments disagree, judge the decision's stated criteria. An inspection addresses safety and repair costs more directly than a popularity poll; preferences may address willingness to use a facility. Opposing arguments can give relevant evidence about different effects, such as learning and tiredness. Weigh both benefits and drawbacks. Bias is a leaning toward one side. Even true reports can mislead by omitting relevant costs or drawbacks. Compare accounts and check what is missing.
A factual claim is checkable and may be true or false. An opinion expresses a preference or value judgment. 'Delicious' is a taste judgment; testing 'best' needs a stated measure. Confidence, dramatic wording and repetition can persuade but do not establish truth. Loaded words such as 'outrageous' push an emotional judgment, not evidence. Propaganda tries to shape beliefs, often through repeated slogans or one-sided messages. Check the support behind the wording.
Find the claim. Check whether its support is relevant, reliable and enough for that claim. Consider the reasoning and any important information left out.
Five original readings authored for this learning dataset.
2 · Watch
Take it off screen
Where it sits
Where this leads
24 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.