Larry Hooper: Lieutenant Colonel Django used funds from the project's black budget to procure prostitutes...
Bill Django: That's a lie!
Larry Hooper: ...and to get drugs for himself and his men.
Bill Django: That... Well, the hooker thing is definitely a lie.
Ewan McGregor asking "What is a Jedi Knight?" is especially ironic (and probably an "in joke") because he famously played Jedi Knight Obi-Wan Kenobi in the Star Wars prequel films.