Abhidharma (in Pali, "Abhidhamma") texts which contain "an abstract and highly technical systematization" of doctrinal material appearing in the Buddhist sutras. It is an attempt to best express the Buddhist view of "ultimate reality" ("paramartha-satya") without using the conventional language and narrative stories found in the sutras. The prominent modern scholar of Abhidharma, Erich Frauwallner has said that these Buddhist systems are "among the major achievements of the classical period of Indian philosophy." Modern scholars generally believe that the canonical Abhidharma texts emerged after the time of the Buddha, in around the 3rd century BCE. Therefore, the canonical Abhidharma works are generally claimed by scholars not to represent the words of the Buddha himself, but those of later Buddhists.