So this Grad Student Is Late To His Statistics Class....Saw a Couple Problems On the Blackboard...

...and thinking they were homework...
From Fermat's Library:

In 1939, George Dantzig, a graduate student at UC Berkeley, solved two open problems in statistical theory, which he had mistaken for homework after arriving late to a lecture by Jerzy Neyman. The two problems ended up being his entire PhD thesis. pic.twitter.com/5UzbaaQwne

— Fermat's Library (@fermatslibrary) April 24, 2020

 

The guy was a bit of a polymath, here's his Britannica bio.
Sometimes I feel so stupid.