On Tue, Jan 24, 2017 at 10:52 PM, BartC <b...@freeuk.com> wrote: >> Remember: If you have only one clock, it might be right and it might >> be wrong, but it's consistent. If you have two clocks and they >> disagree, you have no clue what the time is. > > > I've actually got three wall clocks. Usually only one will disagree with the > other two, meaning it needs a new battery. But don't they use such systems > in avionics?
See what Steve said about 1 or 3 but never 2. Triple redundancy gives you a chance to figure out that two of them agree. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
