It is possible to note one hundred exceptions to one rule of grammar, if it is about a grammatical article, definite or indefinite.
“We use the definite article in front of a noun because there is only one in that context”, may ■a resource say, whereas the Constitution properly would state,
All legislative Powers herein granted shall be vested in a Congress of the United States, which shall consist of a Senate and House of Representatives.
We have the US Constitution ■linguistically updated, and thus it can work perfect for grammar: civics are never meant for esoteric texts; people can begin reading those as soon as people can read.
We may remember our time frames and the ■modal net. The grammatical time is much about the time in mind, and full mastery of the grammatical article, such as to read, write, and speak about pancakes as well as philosophies and literatures, may come when Modal verbs work too.
There are distinct speech parts, but the mind is one.
We might think, after the Modal verbs, it is a long way to the grammatical article. If we do this grammar course with exercises, it may be yet no longer than a few months; and if we only read through, maybe not even a month. After all, we do not have to devote all our time to grammar.
Our theory fruit can cover all the three types of occurrence for the word “Congress” in the Constitution, and we may picture the logic with fruit of choice.
The definite article
The Congress may by law vest the appointment of such inferior officers as they think proper, in the President alone, in courts of law, or in heads of departments.
The indefinite article
All legislative Powers herein granted shall be vested in a Congress of the United States, which shall consist of a Senate and House of Representatives.
No article (or “zero article”)
Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press …
(Work in progress)