Adding or deleting information on ACT English: deciding by relevance to the paragraph's focus whether to keep or delete content, choosing the option whose action (add/keep or delete) and reason both match, and recognizing that off-topic information should be deleted even when it is true or interesting.

What this skill is asking

Add-or-delete questions ask whether a sentence belongs in the passage, and they come in a distinctive two-part form: you decide the action (keep/add or delete) and then pick the reason that justifies it. The deciding test is relevance to the paragraph's focus, not whether the content is true or interesting. The skill is judging relevance first, then finding the option whose action and reason both match your judgment.

Relevance to the focus is the test

The single criterion is whether the sentence serves what the paragraph is about.

The most common trap is keeping a sentence because it is true or interesting. The ACT deliberately offers off-topic sentences that are perfectly true; they are still wrong to keep, because they do not develop the paragraph's point.

The two-part answer

These questions test both your decision and your reasoning, so both halves of the option must be right.

The wrong reasons are usually easy to spot: "because it adds length", "because it is interesting", "because details are never allowed", "because the paragraph should be short". Real reasons name relevance: "because it supports the paragraph's focus on X" or "because it is unrelated to the paragraph's focus on X".

Applying it to an add-or-delete question

Judge relevance, set the action, then pick the accurate reason.

Why relevance-first plus reason-matching is reliable

These questions are predictable once you see the structure: decide by relevance, then match the reason. The relevance test defeats the "it's true, so keep it" trap, and the reason-matching step defeats options that reach the right action for the wrong reason. The skill is the same relevance logic as topic development and the writer's-goal questions, applied to a yes/no decision about a single sentence. Keep your eyes on the paragraph's focus, and both parts of the answer follow.

Try this

Q1. What single criterion decides whether to add or delete a sentence on the ACT, and what are the two parts you must get right? [Recall]

• Cue. Relevance to the paragraph's focus decides it: keep or add a sentence that supports the focus, delete one that is off-topic. You must get both the action (keep/add or delete) and the reason right; a correct action with a wrong reason is still wrong.

Q2. A paragraph about a chef's signature dish includes the true sentence "The restaurant has forty tables." Should it be kept, and what is the reason? [Short explanation]

• Cue. It should be deleted, because it is not relevant to the paragraph's focus on the chef's signature dish. The number of tables is true but off-topic, so it breaks the paragraph's unity. The matching reason names the irrelevance, not the truth or interest of the detail.