[EM] Ranked Pairs Description

[Markus Schulze]

Dear Eric,

suppose that there are 4 candidates and that all pairwise
defeats A > B, B > C, C > D, D > A, B > D, and C > A have the
same strength. Then all 4 candidates are potential winners.

However, suppose that some voters rank candidate A higher so
that the pairwise defeats A > B, B > C, C > D, D > A, and B > D
still have the same strength and C > A is weaker than the other
pairwise defeats. Then you would reject A > B, B > C, C > D,
D > A, and B > D and keep C > A so that ranking candidate A
higher hurts him.

Markus Schulze