Have you heard the one about graduate school?

From Scholars Before Researchers: On the Centrality of the Dissertation Literature Review in Research Preparation by Boote and Beile (2005):

We have all heard the joke before—as we move through graduate school, we learn more and more about less and less until we know everything about nothing.

I hadn’t heard the joke before, but I think it’s hilarious. Must be the limits reference.