This depend very much on how you define "fair," and how it is used in context.
So, I would say a system that only let's white male landowners vote is not "fair" because only an elite group gets to vote. But if their votes are counted properly, and their decision upheld, the election is "fair," and it's a democracy.
On the other hand, a system that lets everyone over 18 vote is arguably "fair." But if the votes are not counted correctly, and the results are false, then the election is not "fair," and you don't have a democracy.
To further the thought, I suppose that if the voting populating is a small enough percentage of the general populating, then it is not a democracy, rather than just a bad democracy. Not sure where that line is, though.
I don't think something can rotate relevant to itself. If all of reality was the earth, and nothing else, how can you tell if it's spinning or not?
Please use small words if you try to answer this. I know a decent bit of applied physics, but once it turns to pure math, my head starts to swim.