The two chapters describing this development are by far the best in the book, crisply written and with a wealth of fascinating detail.
Under these conditions gratings appeared as crisply defined stripes, even at the highest spatial frequencies.
The illustrations are crisply reproduced, with exact management of inking so that none prints too dark or too light, too broken up or too smudged.
Under these conditions, gratings appeared distinctly different from the crisply defined stripes observed at lower background light levels.
He then shows that most of these regularities are not consistently reflected in our perceptions (at least not when the regularities are "crisply" defined).
The intermediate second option presents the issues less crisply.
The introductory chapter outlines crisply the policy puzzle being addressed.
Some of the themes tantalizingly invoked here are more fully explicated elsewhere, while the sometimes formidable formulations of his more ambitious books are crisply recapitulated.