Sorry, not right. This is the opposite term. Illusions are powerful indicators of principles of visual processing. The text argues that this illusion depends on knowledge we have about corners of buildings, both interior corners and exterior corners. We use cues and information about structures to assess line length.
Illusions are powerful indicators of principles of visual processing.
This depends on assumptions about the structure of rooms and the distances from observer to object. Illusions are powerful indicators of principles of visual processing. This depends on assumptions about depth cues and distances from the observer to object.