for x, y, z being set st z <> [<*x,y*>,xor2] & x <> [<*y,z*>,nor2] & y <> [<*z,x*>,nor2] & z <> [<*x,y*>,nor2] holds
for s being State of (BitGFA3Circ (x,y,z)) holds Following (s,2) is stable