The course I'm taking this semester is a 2000-level geology course, which apparently takes an earth systems, geochemical approach to geology. The first day of class, the professor emphasized the prerequisites, including a 1000-level geology course with a lab and a chemistry course.
After class, a student came up to the professor and explained that he didn't have the 1000-level geology course prerequisite.
"But," he said, "I should be ok. My grandfather is a geologist."
Yeah, that should work.