Traditionally the branch of philosophy concerned with the problem of the existence of the Other or ‘unknowable being’, which has been variously interpreted as referring to God (Dasein) and the Indigenous Subject (pleasure). In medical pathology heterology refers to morbid, abnormal tissue composed differently from surrounding healthy tissue. Inspired by this, Bataille, Georges developed a notion of heterology as an anthropology of the unassimilable, or the excessive. Further Reading: G. Bataille Visions of Excess (1985). M. de Certeau Heterologies (1986). E. Levinas Time and the Other (1987).