[time-nuts] Are there limits to the accuracy of clocks?

[Bill Hawkins]

Didier,

You can't walk the Planck, although I am uncertain whether it
is because the Planck is too small or you are too big. Surely,
your engineering judgement would have shown you the impossibility
of it all. :-)

While we have been discussing stuff that is about 10E-20 below
what we can measure, is it possible that the limit of resolution
of the measurement of time is determined by noise? Specifically,
thermal or Johnson noise in those 50 ohm impedances that we
use for our cabling.

Regards,
Bill Hawkins