Once does not have the choice of any shaped head or any shaped tail. One must choose the shape that enhances the basic pattern. A large round massive head on a long slender neck would be as obviously grotesque as a thick blunt tail extending from a long graceful back. We must heed nature as far as healthy functioning is concerned. No standard can or should set down to the last millimeter of a whisker a scientifically exact diagram of a cat.
Nature never produces exact replaces anyway.
The standard is an objective and artistic guide to a judge's own good taste and educated sense of proportion. In like manner, a composer sets down his notes, tempo,dynamics, and phrasing as a guide to the interpretive musician, but he must rely on the musician's own sensitivity and knowledge of style to make the music live. Certain things a good musician never does, such as interpret slow for fast or loud for soft. Likewise, a good judge could never interpret coarse for fine or short for long, though these terms be merely relative and not absolute. Standards are a yardstick by which the breeder may measure his advances toward a perfect feline, by which a judge may compare animals developed according to these guidelines.