But don't you all see? It makes perfect sense. Remember it all comes down to statistics. Let's face it, the likelyhood of a person bringing a gun on board is statistically very low. The likelyhood of two people bringing a gun on board at the same time is approaching a statistical impossibility. Furthermore, three bringing a gun onboard will happen once every billion years or so. Therefore, by both pilots bringing a gun onboard, they are preserving the safety of the aircraft as no-one will bring another gun onboard until the flight-deck is commanded by Captain James T. Kirk.