 Theorists such as Allen Forte define chromatic mediants conservatively, only allowing chromatic mediant chords of the same quality (major or minor) as described above.However, he describes an even more distant "doubly-chromatic mediant" relationship shared by two chords of the opposite mode, with roots a third apart and no common tones; for example C major and "E minor" or "A minor", and A minor and C or F major,.Other less conservative theorists, such as Benward and Saker, include these additional chords of opposite quality and no shared tones in their default definition of chromatic mediants.