I am very familiar with dual intent. I'm a lawyer, and part of my practice, of course, includes immigration law.
“Dual intent” means that if somebody is coming to Canada to study and they also have the intent to become a permanent resident after that, it is perfect and fine under the Immigration and Refugee Protection Act, but I warn study permit applicants from Africa: “Do not ever bring up the issue of dual intent in your application—if you do, it's going to come back to haunt you.”
With regard to dual intent, the problem we are having is that dual intent is being misinterpreted by IRCC decision-makers, and that is what is sad about it, because the law allows for it, but if you express that intent, you are likely going to be refused a study visa to Canada.
All I say—