I'd just like to clarify that. It's what is called dual intent.
That's not exactly how it works. There is likely a misunderstanding of some of the details. The concept is outdated, obsolete, and the act should probably be updated in this respect.
In fact, dual intent for someone means remaining longer than the period authorized on their permit without having applied to do so. It's a matter of something implied, or understood.
Under the act, an immigration officer has the right, after studying the application, to refuse a study permit if that officer believes that the person is likely to remain in the country beyond the period authorized by the permit.
We have reported this problem to IRCC before. We find that the act is becoming increasingly outdated and that it needs to be reviewed.