Problem-Solution and Claim-Counterclaim Shapes

Short academic passages keep repeating the same handful of shapes because writers solving the same kinds of tasks reach for the same moves. A problem-solution text spends its early sentences laying out trouble, then turns, often in its final sentence, to a fix. The turn usually arrives with a signal: a contrasting word, a shift from describing a difficulty to describing an action, or a sentence that starts answering a question the earlier sentences raised. Find that hinge sentence and you have the shape.

A claim-counterclaim text works differently. It stacks blocks: someone's position, then evidence or an argument against it, then often a reply that defends the original position. The author does not always sit in the last block. Sometimes the last sentence is a rejoinder defending the first claim, which means the structure is claim, counter-evidence, defense, and the author's sympathy lies with the opening view, not the closing one. Other times a passage ends on a contradiction and simply stops there, holding no position at all, as when a hypothesis gets tested and the test fails to confirm it. Reading only the last line tells you nothing by itself.

Recognizing these shapes connects directly to the surrounding domain. Word-meaning questions ask what a word is doing in context, and structure is that context at a larger scale. Two-text questions ask how one passage's shape answers or complicates another's. Once a shape is named, the function of any single sentence, including whether it carries the writer's own voice, becomes a smaller and more answerable question.