Favorite betrayal criterion
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The Favorite Betrayal criterion is a criterion for evaluating voting methods formulated by Mike Ossipoff. The criterion may be stated as, "There is no set of votes such that a given voter can improve (from his perspective) the outcome by raising his vote for someone over his favorite."
Approval voting and range voting comply with the favorite betrayal criterion. The Borda count, plurality voting, IRV, and all Condorcet methods fail.
