CONCEPT
Properties vs. Qualities
Wendy Lesser's distinction between what a text
has—the measurable features any tool can assess—and what a text
does to a reader, which exists only in the encounter and cannot be extracted without one.
A property is something a text possesses independent of any reader: sentence length, vocabulary range, syntactic complexity, structural coherence, genre adherence. A quality is something a text does to a particular
consciousness when it meets one with genuine attention—the specific feeling of being moved, bored, surprised, expanded, or unsettled that no summary can convey because the summary replaces the encounter that produced the feeling.
Wendy Lesser's critical practice rests on this distinction, and the distinction has become the most precise available account of what
AI can and cannot assess about writing. AI can measure properties with speed, consistency, and comprehensiveness beyond any human editor—it can identify structural incoherence, grammatical error, and stylistic inconsistency across a manuscript before a reader has finished the first chapter. What it cannot do is have the encounter that produces awareness of qualities: the experience of being stopped by a sentence, slowed by a paragraph, altered by an argument. Qualities do not exist in texts.