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As opposed to commonsensical knowledge, sociology like any other science has its own body of concepts and methods of data collection.
As a social science, sociology does need to have certain agreed upon meanings of social realities and processes in studying. Each subject is required to have a standard vocabulary, terminology, language and concepts through which professionals can converse and maintain the different identity of its subject.
It becomes all the more important to discuss sociological terms so as to distinguish what they mean from commonsensical usage which may have varied meanings and connotations.