Consensus
Consensus has a range of definitions from unanimity to various levels of majority.
Unanimity minus two has a certain advantage as a level for use in a wiki. It may become the standard level for most decisions of the Consumerium Governance Organization, simply because it reflects what goes on in an wiki revert duel so perfectly.
See w:consensus and especially w:consensus decision making for a deep discussion of advantages and disadvantages of various levels of consensus depth.