Passage Summary: An argument is made that art teachers should use paper for color lessons because it's easier to get the exact same color twice, unlike paint which is messy and inconsistent.

Conclusion: Art teachers should prioritize using colored paper over paint when demonstrating color use to their students.

Reasoning: Paper allows for exact color replication and precise comparison across contexts, whereas paint is difficult to mix consistently and has distracting textures.

Analysis: The argument relies on a gap between the physical properties of the materials and the educational outcome. It assumes that the consistency of paper and the lack of texture are actually beneficial—or even necessary—for learning about color. If students actually learned better from the 'interference' of texture, the argument would fall apart. Look for an answer that confirms that the specific advantages of paper (consistency and purity) are essential to the goal of teaching color effectively.