wolfger,
The argument could be made that the glass is always empty too. Or at least, so close to empty no one cares. I am of course talking about the nature of atoms and how much of the building blocks of matter are empty. You can't make the argument that the empty part is filled with air.
You can't make the argument that the empty part is filled with air.
Not with air, but how 'bout the quanta of the interaction holding electrons and nuclei tied up? But seriously, how could we get here, when everything seemd to have started from the idea of a good glass of beer, or wine? Now, where's my pint of Slalom Strong?!?