For precision, the sapphire clock outshines even the best atomic clocks
Related side note: It has always bugged me that the defintion of 1 second, a unit of time, is defined by an atomic oscillation frequency, which is itself a unit x&#x2F;t. A unit of time refers back to itself in its own definition. My lay understanding is imprecise and I&#x27;m sure there&#x27;s an expert in the wings who could fix it.
Then again most belief systems have a root paradox somewhere within them. Perhaps this is ours.