> you will find that particles are contextually defined as pieces of matter in the solid or liquid phase which are suspended in the air.
What is this supposed to mean? The solid or liquid phase is defined by the interaction of related molecules with each other. Suppose I have a cluster of 15 water molecules, suspended in the air, interacting with each other such that I can call them a tiny droplet of liquid water. Suppose I have one oil molecule, also suspended in the air. It is much larger than the 15 water molecules are combined. But it's not in a solid or liquid phase, because there's only one of it. The filter is required to handle the water, but there are no requirements for how it should handle the oil?