Immanuel Kant (1724–1804) defined his typology by a duality of the beautiful and sublime, and concluded it was possible to represent the four temperaments with a square of opposition using the presence or absence of the two attributes. He determined that the phlegmatic type has no interest in either the beautiful or the sublime, so there was an absence of both (sb). The melancholic had a feeling for both (SB), and the sanguine had a predominating feeling for the beautiful (sB), while the choleric, he determined after comparing with the melancholic, lacked a sense of beauty and had only a sense of the sublime (Sb).