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Examples are most effective when they clarify an idea that would otherwise remain abstract, showing not only what a concept means but also how it works in practice. In instructional writing, a strong example usually follows a brief explanation and uses familiar details, so readers can connect the general rule with a recognizable situation. A test example in technical documentation should state the expected input, the relevant conditions, and the resulting output, making the procedure easy to verify and reproduce. Comparable examples can then reveal how a small change in context produces a different result, which is often more informative than a longer definition. Editors also distinguish between illustrative cases and counterexamples: the first supports a principle, while the second marks its limits without obscuring the central point. Used selectively, concrete examples improve comprehension, support accurate comparison, and give readers a practical standard for judging whether they have understood the material.