ACT Reading: Back Up Inferences with Textual Evidence, Not Imagination

An inference is a logical conclusion based on evidence in the text. An unjustified guess is an imagination or assumption not grounded in the passage. Example: A passage says "Sarah clutched her purse and looked over her shoulder as she walked down the dark street." Supported inference: "Sarah felt unsafe or anxious." This is based on evidence (clutching purse, looking over shoulder, dark street). Unjustified assumption: "Sarah was mugged yesterday." There's no evidence for this; you're adding information the passage doesn't provide. ACT Reading rewards inferences that follow logically from evidence; it penalizes inferences that require assumptions or outside knowledge.

The difference: Inference uses only what's in the passage. Assumption adds details or backstory not mentioned. On test day, ask: "Does the passage provide evidence for this conclusion, or am I filling in gaps with my imagination?" If the passage supports it, it's a valid inference. If not, it's an unjustified assumption.

Trap 1: Making a reasonable inference, but it's not the one the passage supports. "The author criticizes government policies" is a reasonable inference, but if the passage focuses on the effects of policies without criticizing them, that's your inference, not the text's message. Trap 2: Inferring too much from limited information. A passage mentions a character is quiet. You infer they're shy, introverted, and anxious. But "quiet" might just mean they don't talk much in this particular situation; the passage doesn't support the broader inference. Ask: "What does the passage directly state?" Build your inference from that foundation only. Don't add layers of interpretation beyond what's supported.

When you make an inference, point to the specific sentence or phrase that supports it. If you can't find textual support, your inference is unjustified.

Passage: "The company's new product launch was delayed by three months. Investors grew impatient, and stock prices fell 15%." Inference 1: "The delay hurt the company's financial performance." Supported? Yes (stock prices fell). Inference 2: "The CEO was incompetent and should be fired." Supported? No. The passage doesn't mention the CEO's competence or suggest they should be replaced; you're adding your own judgment. Inference 3: "Investors lost confidence in the company." Supported? Yes (impatience and falling stock prices suggest lost confidence). Notice the difference: Inferences 1 and 3 use only the passage's evidence; Inference 2 adds outside judgment and assumptions.

Take five passages and identify three inferences for each. For each inference, point to the textual evidence that supports it. If you can't find support, it's an unjustified assumption, not a valid inference.

Inference questions are among the most common on ACT Reading, and students who stick to textual evidence answer them with high accuracy. Once you develop a habit of supporting every inference with specific textual evidence, you'll answer inference questions confidently and avoid trap answers that sound reasonable but aren't actually supported.

This week, mark every inference you make and the textual evidence supporting it. By test day, you'll make only supported inferences and earn reliable points on inference questions.