Building an Argument: Claim, Reason, Evidence

Imagine you want your class to get 10 extra minutes of recess. If you just say 'recess should be longer,' most teachers will say no. But if you say 'recess should be 10 minutes longer BECAUSE studies show kids focus better after more physical activity, AND our own class was louder and more distracted on the two days recess got shortened last month' — now you have an argument someone has to actually think about. That's the difference between an opinion and a real argument: a claim, a reason, and evidence to back it up.

- The 3 building blocks of every strong argument: claim, reason, and evidence - How to tell a fact from an opinion - How to use evidence someone else can check - How to state the other side's point before answering it

A claim is the one sentence that says exactly what you think should happen or be true. A strong claim is specific, not vague. 'School lunch should be better' is vague — better how? A strong claim says: 'Our school should add a salad bar option because it would let students choose healthier food.' Notice this claim already hints at the reason, which makes it easier for a listener to follow.

A reason connects your claim to something true using the word 'because.' If you can't finish the sentence 'I believe ___ because ___,' your argument isn't ready yet. Good debaters often have 2-3 reasons, not just one, because a single reason is easier for the other side to knock down. In 1858, Abraham Lincoln and Stephen Douglas held seven famous debates about slavery's expansion into new U.S. territories. Lincoln didn't rely on one reason — he combined moral, legal, and historical reasons together, which made his overall argument much harder to dismantle with a single counterpoint.

Evidence is different from a reason. A reason is your logic; evidence is outside proof — a fact, statistic, quote, or example that someone else could look up and verify. Saying 'I think recess helps kids focus' is a reason. Saying 'a 2009 study published in Pediatrics found students were significantly less fidgety and more attentive in class after at least 15 minutes of outdoor recess' is evidence, because it points to a specific, checkable source. The strongest arguments always pair a reason (your logic) with evidence (outside proof) — logic alone can sound convincing but be wrong, and evidence alone without explanation can feel random.

The strongest debaters state the opposing view honestly before responding to it — this is called a counterargument, or 'rebuttal.' For example: 'Some people think recess should stay the same length because class time is already limited. However, research shows that longer recess actually improves focus enough to make up for the shorter class time.' Naming the other side's point first shows you've thought it through, and makes your response land harder.