While it seems obvious to humans that gunpowder in a gun barrel creating expanding gasses is not the same thing as inflating something...on closer inspection they really are only subtly different. If we consider the bullet to be part of the system then the expanding gasses do actually increase the exterior volume of the gun as it travels up the barrel.

This is the sort of interesting leap that makes AI super interesting to me. I could see it being very useful in helping humans move the state of the art forward in areas where human lexical taxonomy has caused us to make some assumptions which blind us to other potential solutions.