Processes taking place near high gravitation or moving at near light speed are slowed. General relativity tells that it is due to slowing of time in these conditions. Why can’t we say that this is due to slowing of the process itself in these conditions rather than slowing of the time? Is it not possible that in the atomic clock near high gravity or at high speed, the oscillation of cesium atom itself is slowed down rather than slowing of time? Is it not possible that the physiology and cytology of the twin living near ground or moving at near light speed is slowed down, delaying the ageing phenomenon, rather than slowing the time?