عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Multiverse and resorting to anthropic principle or reasoning within the multiverse scenarios has recently appeared in some physical contexts. In this paper, we first distinguish three kinds of multiverse paradigms in Lagrangian formulation for physical systems. We argue that multiverse can be a classical effect, like the one appearing in string landscape, or a quantum effect, like the one in chaotic inflation models. We then critically review two arguments suggesting the necessity of abandoning the observability and/or testability criteria in the multiverse. We argue that such a viewpoint is not justified, as the characteristic feature of scientific knowledge is its experimental/observational confirmation. Therefore, multiverse scenarios can enter the realm of scientific theories only after becoming a testable theory. We also introduce a criterion for testability.