Do Not Argue with Old People

I received my (third) study permit extension last Friday, so today I went to renew my (third) SIN card. The clerk that received me is an old woman, as in old, and she has this habit of shaking her head every time. After she looked at my documents she began typing on her computer, which took her a long time. Then she printed something, it's a manual from the website on how to renew a SIN card. She kept insisting that I need to have a work permit. FYI, a study permit allows one to work within the campus and this includes teaching and research assistantships which BTW pays my tuition and fees. To cut the story short, I did not succeed today. So I went to McDonalds and ordered myself a quarter-pounder.