How many logical methods are there to clarify the concept?

According to traditional logic, the connotation of a word is its meaning, that is, its concept, which reflects the unique attributes of things. For example, the connotation of "commodity" is "labor products produced for exchange"; The extension of a term is the kind of thing that a term refers to. For example, the extension of "person" is the kind that everyone has been making up through the ages. As one of the textbooks of modern logic, Bohr-Royal Logic first put forward the difference between connotation and extension. Although later logicians have different views on the rationality of this distinction, the terms "connotation" and "extension" have been used to this day.