Earlier quoted context omitted.
"No one expects them to create things, that's left to those nuts like me (someone said this to me point-blank)." I distinguish the two types of students by whether or not they need calculus to proceed. The ones who don't are just serving time.
As a person of humanities background, I find that criterion questionable. :-)
How about we say the ones not studying calculus are 85% likely to be just serving time. ;-)
How would you determine which university students are just there to get a degree, any degree?