 The Theravādins created their own distinct version of the doctrine of momentariness. They do not seem to have been as concerned as the Sarvāstivādins with the ontology and epistemology of material and mental realities per se. Rather, they were more preoccupied with the psychological apparatus governing the process of cognizing of sense data, and hence with the changing ratio between material and mental phenomena. The Yamaka of the canonical Abhidhamma offers what is probably the first textual occurrence of the term “moment” (khaṇa) in the sense of a very brief stretch of time that is divided into origination and cessation instants (Kim 1999, 60–61). Relying on the three characteristics of conditioned phenomena, the Pali commentaries later present a scheme wherein each moment of every phenomenon is subdivided into three different instants of origination (uppādakkhaṇa), endurance (ṭhitikkhaṇa) and cessation (bhaṅgakkhaṇa) (Spk II 266; Mp II 252). These are three phases of a single momentary phenomenon defined as one single dhamma or consciousness moment. A dhamma occurs in the first sub-moment, endures in the second, and ceases in the third (Karunadasa 2010, 234ff). The commentarial tradition thus analyzes phenomena temporally by dissecting them into a succession of discrete, momentary events that fall away as soon as they have originated in consciousness. As one event is exhausted, it conditions a new event of its kind that proceeds immediately afterwards. The result is an uninterrupted, flowing continuum (santāna) of causally connected momentary events. These succeed each other so fast that we conceive of the phenomena they constitute as temporally extended.