And if someone wants to know how to make objections to actual craftsmen themselves on the subject of art in general or any particular art, there are published treatises available, as you know.
A treatise is a long, formal piece of writing about a particular subject. Locke's Treatise on Civil Government. a serious book or article about a particular subject treatise on (tretiz, from traitier; TREAT)
Single volumes or sets (often regularly updated) that describe and analyze a limited subject area of the law May be scholarly, practical or a combination of the two Some of the better textbooks may be classed as treatises
a formal and systematic exposition in writing of the principle of a subject, generally longer and more detailed than an essay, especially a discussion of facts, evidence, or principles and the conclusions based on them