[Retric]

Physics is all based on predictions not arbitrary definitions. To suggest something is filling space you must be able to hit it with something else. This talk of empty space, comes from actual experiments.

Shoot a neutral particle through that cloud and you generally find it really was empty. Wave particle duality doesn’t mean a particle is in every location, just that it could be in every location. After detection you generally find all the places it was not.

[mcnamaratw]

Right ... except that if I want to put more electrons in the same space I'm going to have to confine them more tightly. That prediction works.

[Retric]

An oxygen tank where you can safely add more oxygen by increasing the pressure is not considered full. The percentage of how empty a container is can be considered 1 -(amount of stuff in it) / (maximum stuff possible).

[mcnamaratw]

I think possibly you've defined "full" two different ways. Is it maximum safe pressure or maximum stuff possible?

[Retric]

I don’t see the contradiction, Space unlike a gas tank is not going to fail.

[goatlover]

Physics does say fields like gravity and EM fill all of space. That's not arbitrary, it's part of QM and Relativity.

And wave particle duality could mean that a particle is a wave when it's not being detected.