WP requires \(f\) to respect unanimous strict preferences. That is, whenever everyone strictly prefers one alternative to another, the social ordering that \(f\) derives must agree. Pairwise majority decision satisfies  WP.[2]  Many other well-known voting methods such as Borda counting satisfy it as well (see  Section 5.2). So WP requires  that \(f\) is to this extent like them.