The argument makes less sense outside of it’s context. Moore was responding to the skeptical position that we’re all in a simulation. Moore argues that this skeptical argument undermines itself: all of the language, terms and concepts which form the simulation argument are based on the sensory experience that the argument would effectively dismiss. Furthermore, any argument that we’re in a simulation is epistemologically on a par with the argument that we’re not. Therefore we should have less confidence in the skeptical argument than the common sense conclusion that we have hands.