Ask: Such synchronous clocks possible? Special and general relativity steam-roll over synched digit accuracy, at introducing any object's mass, any object's di

Ask: Such synchronous clocks possible? Special and general relativity steam-roll over synched digit accuracy, at introducing any object's mass, any object's displacement. Not gain or lose over five billion years? How many digits this time? Tides, quakes, rain on the roof, defeat the possibility of unbounded synched accuracy.