Namely, in the family belonging to the syntonic temperament continuum, including meantone temperaments. The Idealist temperament is one of four temperaments defined by David Keirsey. The Rational temperament is one of the four temperaments defined by David Keirsey. Labradors are an intelligent breed with a good work ethic and generally good temperaments. Bichons are bred to be small, charming companion dogs with even temperaments and playful attitudes. Waldorf education and anthroposophy believe that the temperaments help to understand personality. Melancholy was one of the four temperaments matching the four humours. It is used to notate both just intonation and equal temperaments. Emotional phenotype temperaments affect social connectedness and fitness in complex social systems. Other equal temperaments divide the octave differently. There could also be "balance" between the qualities, yielding a total of nine temperaments. The unevenly distributed well temperaments contain many different semitones. Kant applies the approach of four temperaments to distinguish truly virtuous people. They fall in love despite the differences in their background and temperaments. They held opposing political views and had very different temperaments.