What is a Boolean Mesh?

All of my models are boolean meshes! What does this mean? It means no interior geometry, one single unified mesh, ie one single surface which makes up the entire model. This is how all models intended to be 3D printed (Resin or FDM) should be prepared, simple as that. I have had some FDM users confused by this, in their slicer it somehow looks hollow, however a boolean mesh is completely solid, for something to be hollow it must have walls, which these do not. In the digital space everything is a surface and doesn't have physical density, therefore if you slice it open there isn't anything inside to see like a real object, just the other side of the outside surface. It all makes sense once you wrap your head around that idea.