"A report based on the book Academically Adrift: Limited Learning on College Campuses found that after two years of college, 45% of students learned little to nothing. After four years, 36% of students learned almost nothing."
Hmmm . . . seems like the longer they stay, the less they learn . . . or, perhaps better stated - they learn plenty - it's just that most of what they learn is wrong. ;o)