Passage Summary: An author claims her art book is totally neutral, but a critic points out that her writing is actually much better when she likes the art she is describing.

Reasoning: Waverly claims her art textbook is purely objective, but the critic notes that her writing quality improves significantly when she personally likes the art she is describing.

Analysis: The critic is suggesting that Waverly's subjective preferences are leaking into her work, despite her claims of neutrality. If her prose is more inspired by art she likes, then her 'objective' accounts are likely not as uniform or neutral as she believes. We are looking for a deduction that follows from this discrepancy. It is a classic case of 'actions speak louder than words'—or in this case, the quality of the words reveals the author's true feelings.