Izinketho zokuhlala zokuhlala ezithengiswayo zingathintwa - ngokwezinye izinhlobo zezinhlobo - isiqophi sifakwe ngezinye izinhlobo zezindiza kanye nezindiza, lokhu kuyinto isicelo esiqondile, izintuthuko zokuhlala zokuhlala kanye nezindiza zifakwe futhi zihlanganiswa ngezintuthuko zezinye izikhala zomhlaba, ukuxhumana kwezikhala kwezikhala kungakwazi ukwenziwa ngezinketho eziningi.