By the mid-fourteenth century, professional associations of canon lawyers (legal advocates in Christian ecclesiastical courts, which dealt with cases involving marriage, inheritance, and other issues) had appeared in most of Western Europe, and a body of professional standards had been defined for them. ███
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The author refers to the ██████████ █████ ██ ███████ ██ ███ █████ █████████ ████ ████████ ██ █████ ██
introduce a theory █████ ██ ██ ████████
The reference to the Florentine guild doesn’t “introduce” a theory. It provides support for the previous line.
illustrate the type ██ ██████ ████████ ██ ██ ███ ████████ ████████
The Florentine guild reference illustrates the action referred to in the previous sentence — the guild attempted to stop efforts at enforcing disciplinary rules.
underline the universality ██ █ ██████ █████████ ██████████ ███ █████████
The author doesn’t indicate that what the Florentine guild did was “universal.” It’s just one example of how “some” guilds tried to stop enforcement of disciplinary rules.
point out a ████ ██ ██ ████████ █████████ ███████ ██ ███ █████████
The Florentine guild is used as support for the author’s own view. There is no flaw pointed out in an argument earlier in P1.
rebut an anticipated █████████ ██ █ ██████ ████ ████████
The Florentine guild is used as support for the author’s own view. There is no objection raised to the idea that some associations tried to stop enforcement of disciplinary rules.