Single-Profile Neutrality (SPN): For any \(\langle R_{i}\rangle\), and any alternatives \(x\), \(y\), \(z\) and \(w\): IF for all \(i: xR_{i}y\) if and only if \(zR_{i}w\), and \(yR_{i}x\) if and only if \(wR_{i}z\), THEN \(x f\langle R_{i}\rangle y\) if and only if \(z f\langle R_{i}\rangle w\), and \(y f\langle R_{i}\rangle x\) if and only if \(w f\langle R_{i}\rangle z\).