 As remarked in  Section 2.3,  string theory has an enormous number of lowest energy states (vacua), which would manifest themselves at the level of observations and experiments in terms of different higher level physical laws and values of the constants. When combined with the idea of island universes as suggested by inflationary cosmology one obtains a cosmological picture in which there are infinitely many island universes where all the different string theory vacua—corresponding to different higher-level physical laws and constants in these laws—are actually realized in the different island universes. This so-called landscape multiverse qualifies as a concrete multiverse scenario in the sense of the argument from fine-tuning for the multiverse. A necessary condition is of course that the collection of island universes that are part of the landscape multiverse includes, as is widely believed to be the case, at least one universe with the same effective (higher-level) laws and constants as our own.