Original: Whedon, Firefly: the complete series: "Train Job" commentary, track 10 He tends to act like a "lummox" who thinks he is the smartest person in space, but occasional hints of intelligence peek through this façade, giving the impression that he acts dumber than he is.
Simplified: Whedon, Firefly: the complete series: "Train Job" commentary, track 10 He thinks he is the smartest guy in space but he is just the opposite.