Gav: "Dress as thy favorite scientist or free thinker of yore." Hm. Too bad he specified "of yore." I wouldn't have needed a costume otherwise...

Jeannie: So help me out, Gav... Who are some famous female scientists I could be?
Gav: Madame Curie.

Jeannie: Yes, of course her. Who else?
Gav: That's it. Nobody knows any others.

Jeannie: Well, that's ridiculous... What about... um.. hrm... uh... Typhoid Mary?
Gav: Now, M. Curie often wore her hair up...