Decisions, Decisions, Decisions: Thoughts about actions in an Everett World

          @misc{ pirsa_07090075,
            doi = {10.48660/07090075},
            url = {https://pirsa.org/07090075},
            author = {},
            keywords = {},
            language = {en},
            title = {Decisions, Decisions, Decisions: Thoughts about actions in an Everett World},
            publisher = {Perimeter Institute},
            year = {2007},
            month = {sep},
            note = {PIRSA:07090075 see, \url{https://pirsa.org}}
          }
          

Abstract

The most common objection to the Everett view of QM is that it \'cannot make sense of probability\'. The \'Oxford project\' of writers such as Deutsch, Wallace, Saunders and Greaves seeks to meet this objection by showing that the Everett view allows some suitable analogue of decision under uncertainty, and that probability (or some suitable analogue of probability) can be understood on that basis. As a pragmatist, I\'m very sympathetic to the idea that probability in general needs to be understood in terms of its links with decision; but I\'m sceptical about whether the Everett picture provides a suitable analogue of decision under uncertainty. In this talk I\'ll try to justify my scepticism.