Just curious, why is the concept of absolute majority not used a criteria? For example, to win an election in India, you require an absolute majority (if there are 3 candidates and A wins 40%, B wins 30% and C wins 30%, A is still not a winner because a total of 60% voted against A). I see it in this election and in the Brexit vote, a major decision is based on a simple majority with <5% difference.