"wobbly" means that it moves unsteadily so it cannot be an attribute of a floor. It's the table the one that wobbles if the tips of the legs are coplanar and th

"wobbly" means that it moves unsteadily so it cannot be an attribute of a floor. It's the table the one that wobbles if the tips of the legs are coplanar and the floor is not a plane. Your point of the extent of deformation the floor can have for the theorem to hold is valid though.