2.A Choosing a Subject, a Focus and a Purpose

A subject like technology or social media is too wide for any essay to argue well, because no amount of evidence can prove a claim that size. You cannot show, in a few hundred or even a few thousand words, that social media damages adolescence in general. You can show something about one district, one policy, one set of numbers. Narrowing means trading a subject for a focus: a specific, defensible claim where the evidence you actually have reaches all the way to the conclusion you want to draw. The test isn't how important a topic sounds. A narrow claim about one town's pool budget can carry more real argumentative weight than a sweeping claim about public health, because the narrow one can be fully proven and the sweeping one can't.

Purpose grows directly out of focus. Once you know the specific claim, you know what you're trying to do to the reader, convince them to keep a pool open, change a policy, see a cost differently, and that purpose shapes every choice after it: word choice, tone, what counts as good evidence. A focus chosen before research is a hypothesis, not a conclusion, and real evidence sometimes refuses to cooperate. When research turns up a stronger, more provable pattern than the one you planned to argue, the strongest move is to follow the evidence to the sharper claim, not force the data to fit the original plan.

This choice of subject, focus and purpose sets up everything downstream. The introduction has to state that narrowed claim clearly enough that a reader knows exactly what's being argued, and the conclusion has to return to it, now sharpened by the evidence the essay actually delivered. Neither paragraph can do its job if the focus underneath them is still too wide.