Well, it tells us two important things. First, gas molecules have no volume. And second, gas molecules exert no force on one another. That means if we had a system continuing containing two gas molecules, gas molecule A and gas molecule B, that means these two guys have no volume and they exert no force on one another, so they can't communicate. So in many different ways, molecule A is invisible to molecule B and molecule B is invisible to molecule A. And that leads directly into the following results pressure created by one gas molecule is independent of the pressure created by another gas molecule.