How Sentences Support a Claim When the Link Is Clear

An argument is a claim held up by reasons. The word 'because' is the test: if you can insert it between a sentence and the claim and the logic holds, that sentence is a premise, a brick in the structure. If inserting 'because' produces nonsense, the sentence is just sitting nearby, not holding anything up. A passage about a library's Sunday hours might mention the building's age. That's true, but it doesn't answer 'why should Sunday hours stay' the way visitor counts do.

Premises don't always sit directly under the final claim. Sometimes they stack: one premise supports a middle step, and that middle step supports the final claim. A later school start time produces more sleep; more sleep produces higher attendance. The start time doesn't support attendance directly, it supports the sleep claim, which then supports attendance. Reading passages often hide this chain by listing sentences out of logical order, so the job is to find which sentence answers 'why' for which other sentence.

This connects to counterclaims and sufficiency, the other pieces of this unit. Once a sentence passes the because test, the next question is whether it's enough on its own to prove the claim, or whether it needs the other premises too, and whether an opposing reason could undercut it. Spotting support is step one; weighing whether the support is adequate comes next.