Original sentence: A nameplate on the device is engraved with the phrase Ultima Ratio Regum, Latin for "The Last Argument of Kings" (this phrase was engraved on all of Louis XIV's cannons).Fisheye, the original user of the weapon, is posthumously chided by Ng because he overestimates the effect of the gun, leading to a lapse in tactical judgement which results in Fisheye's death.Hiro is able to debug it later, and uses it until its ammunition supply is depleted.It consists of a large, wheeled ammunition box, an exaggerated Gatling gun configuration, a harness for user comfort, and a nuclear isotope power system, whose heatsink must be submerged in water.It is worn in her vagina to prevent rape; it injects a general anesthetic into the assailant's penis upon penetration, rendering him unconscious in moments.Its name references the vagina dentata folk tale.Reason is a needlegun-type Gatling rail gun that fires depleted uranium ammunition.The Metaverse is a fully immersive 3D virtual space, an outgrowth of the Internet.The dentata is a personal-security device employed by Y.The weapon, created by Ng, was still in beta testing, and suffers a software crash during a pitched battle.Though the dentata is mentioned frequently, particularly when Y.Within the novel, Reason has a certain particular status as a personal superweapon, and as such has a profound psychological effect on individuals using it or witnessing its use.thinks she might soon need it, Stephenson does not explain the device until she forgets to remove it prior to sex with Raven, thus bringing their ardor to a premature halt