Events

Various sorts of “multiverse” scenario force us to reflect both on the aims of physics and on the sorts of considerations that can make a theory credible. This topic has been somewhat suppressed in the physics community by the prevalence of operationist and instrumentalist rhetoric (“Shut Up And Calculate”). I will survey the situation with respect to how multiverse theories could address fine-tuning problems, and the challenges that remain in making the principles used for assessing credibility clear and explicit.