If "Master/Slave" terminology in computing sounds bad now, why not change it to "Dom/Sub"?
It sounds way less offensive to those who decry the original terminology's problematic roots but still keeps its meaning intact.
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A lot of distributed databases use the concept of quorum to prevent split-brain. Does that make them a kind of democracy?
Usually quorum is maintained by using odd numbering so that when one node fails the next sequential node assumes the role allowing quorum-election breaking any ties.
It depends, there are too many different databases to say they all use that approach.