No, I'm disagreeing with their argument and saying social class is not the same thing as academic attainment. To return to the topic of the article, a limo is

No, I'm disagreeing with their argument and saying social class is not the same thing as academic attainment. To return to the topic of the article, a limo is (was) a means of signalling wealth. You cannot tell from the outside if the person riding in it has inherited their wealth or earned it from monetising their PhD. But the world changed and now you can see teenagers from working class families able to afford to rent one for the high school prom, or 20-somethings for a stag night.