(documentationproperlyFillsEnglishLanguage "(properlyFills ?OBJ ?HOLE)means that ?HOLE is properly (though perhaps incompletely) filled by ?OBJ, i.e. some part of ?HOLE is perfectly filled by ?OBJ. Note thatproperlyFills is the dual of completelyFills, and is so related to partiallyFills that ?OBJ properlyFills ?HOLE just in case ?OBJ partiallyFills every part of ?HOLE. (Thus, every perfect filler is both complete and proper in this sense). Every hole is connected with everything with which a proper filler of the hole is connected. Every proper part of a perfect filler of (a part of) a hole properly fills (that part of) that hole.")