Are you really sure that a floor can't also be a ceiling?

Are you really sure that a floor can't also be a ceiling?

It was supposed to be a floor, but it became a ceiling.

I see the president's package as the floor, not the ceiling.

He hung everything that he had done during the residency on the walls and covered the walls floor-to-ceiling with his drawings. So we tried to get the informality and the kind of grandeur of that installation in our installation.

He hung everything that he had done during the residency on the walls and covered the walls floor-to-ceiling with his drawings, ... So we tried to get the informality and the kind of grandeur of that installation in our installation.