Just when you thought wearing a t-shirt adorned with obscure Star Wars quotes couldn’t get any nerdier, they went and added graphical set theory mathematics. Those funky overlapping circle exercises you learned in Algebra 1? Yeah, those are Venn Diagrams, and as you can see, they perfectly illustrate the power of the Jedi Mind Trick, as classically employed by Master Obi-Wan Kenobi.

(Found via ThinkGeek.)