 :::Maybe, but it is too much original research if we go through and pick out the common theme that runs throughout each form  of democracy. For example, you said yourself that if there is a dictator that it can't be a democracy. I disagree, because according to the definition of liberal democracy, all that is required is that the ruler is elected. We can argue forever about what a democracy and even if we both agree, it is still not good enough. Wikipedia is about more than consensus. It's about consensus about what the sources say. Consensus that can't be sourced is original research.  