 On this line of thought, the multiverse should be accepted for the same reason we accept many claims about what we cannot directly observe—namely, as an inevitable consequence of an established physical theory. It is not clear, however, that EI is inevitable, as not all inflationary models, arguably including those favored by CMB observations, have the kind of potential that leads to  EI.[52]  Accounts of how inflation leads to EI rely on speculative  physics.[53]  Furthermore, if inflation does lead to EI, that threatens to undermine the original reasons for accepting inflation (Smeenk 2014): rather than the predictions regarding the state produced at the end of inflation taken to provide evidence for inflation, EI seems to imply that, as Guth (2007) put it, in EI “anything that can happen will happen; in fact, it will happen an infinite number of times”.