https://registrar.uchicago.edu/data-reporting/degrees-awarded/
It clearly says the degrees awarded by the University of Chicago in 2017 are as follows:
Undergraduates 1397
Graduates 1819
Business 1279
Law 293
Medicine 89
The total is 4877. So ONLY 28.6% OF DEGREES AWARDED TO UNDERGRADUATES.
Who is confused? or you caught UChicago lying.
I have always recommended students not go to a school full of graduate students unless they know what they are doing. You might not have watched this – https://www.today.com/video/mental-health-policies-at-universities-draw-increasing-concern-708889155922
UChicago is a top feeder school for mental hospital. Read my old posts to find out my estimate of how many students are in the mental hospital.