Passage Summary: Tailors change patterns to account for how fabric stretches and to make sure the clothes fit the person's body. Because of this, the author claims tailors never just follow the instructions exactly as written.

Conclusion: Professional tailors always modify patterns to ensure a perfect fit for the wearer rather than following them without changes.

Reasoning: Tailors adjust for fabric distortion and for size differences between the pattern and the person.

Analysis: The argument concludes that a tailor *always* adjusts the pattern to fit the wearer *exactly*, but the premises only say they do this *unless* the wearer already matches the pattern size. This creates a logical gap: what if the wearer is a perfect match for the pattern? To make the conclusion follow logically, we need an assumption that guarantees an adjustment happens every single time. Look for an answer that suggests no one ever perfectly matches a pattern, or that the adjustment for fabric distortion itself counts as an adjustment to fit the wearer exactly.