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.