The reasons why students or educated adults might use nonstandard language even though they know standard English can include:
- The feeling that correct language is not important
- Showing that they fit in with a particular social group who may use nonstandard English
- Rebellion or unwillingness to fit into the business environment
- Careless, habitual use of language learned as a child
The option "showing that they are highly educated" typically does not apply, as using nonstandard language is not generally associated with demonstrating high levels of education.