The relationship between Buddhism and science is a subject of contemporary discussion and debate among Buddhists, scientists and scholars of Buddhism. Historically, Buddhism encompasses many types of beliefs, traditions and practices, so it is difficult to assert any single "Buddhism" in relation to science. Similarly, the issue of what "science" refers to remains a subject of debate, and there is no single view on this issue. Those who compare science with Buddhism may use "science" to refer to "a method of sober and rational investigation" or may refer to specific scientific theories, methods or technologies. There are many examples throughout the Buddhist world of non-scientific worldviews, such as dogmatism, fundamentalism, clericalism, devotion to supernatural spirits and deities. Nevertheless, since the 19th century, numerous modern figures have argued that Buddhism is rational and uniquely compatible with science. Some have even argued that Buddhism is "scientific" (a kind of "science of the mind" or an "inner science"). Those who argue that Buddhism is aligned with science point out certain commonalities between the scientific method and Buddhist thought. The 14th Dalai Lama, for example, in a speech to the Society for Neuroscience, listed a "suspicion of absolutes" and a reliance on causality and empiricism as common philosophical principles shared by Buddhism and science. Buddhists also point to various statements in the Buddhist scriptures that promote rational and empirical investigation and invite people to put the teachings of the Buddha to the test before accepting them. Furthermore, Buddhist doctrines such as impermanence and emptiness have been compared to the scientific understanding of the natural world. However, some scholars have criticized the idea that Buddhism is uniquely rational and science friendly, seeing these ideas as a minor element of traditional Buddhism. Scholars like Donald Lopez Jr. have also argued that this narrative of Buddhism as rationalistic developed recently, as a part of a Buddhist modernism that arose from the encounter between Buddhism and western thought.