premise: VX gas is one of those things we wish we could disinvent
hypothesis: vx gas is best characterized as a kind or type of organophosphate nerve agent, defined as 'any of a series of nerve agents containing organophosphate compounds first synthesized by German chemists in 1936; in World War II the Germans tested them in concentration camps but not on the battlefield; Iraq is alleged to have used them against Iran and against the Kurds' .