Nerdier Than Thou

Ilya Somin comes to terms with his pop-cultural ignorance:

The lesson to be learned, if there is one, is that rational ignorance is a universal phenomenon, not limited to the "stupid" unwashed masses. We are all inevitably ignorant about a wide range of topics. Unfortunately, however, popular ignorance about politics probably causes more social harm than academic geeks’ ignorance about pop culture.

The highest-ranking celebrity I’d never heard of: Jay-Z, ranked no. 9.

Who he?