Branching of possible worlds

Relativism and Two Kinds of Branching Time

“…(Pooley, 2013, 339) distinguishes between ‘ ‐theoretic branching’ ( possible branching) and ‘ ‐theoretic branching’ ( actual branching), between interpreting the branches as representing ‘several equally real possible ways that the single future might turn out’ ( possible branching) as opposed to representing ‘several equally real futures’ ( actual branching). Similar distinctions are also drawn in (Earman, 2008, 188–190), (Williams, 2008, §1), and (Percival, 2013, 4268).…”

“…Bacciagaluppi (2002), Wallace (2005), Saunders and Wallace (2008), and Belnap and Müller (2010) seem to assume that it does; Saunders (2010) and Wilson (2012) argue that it requires only 'diverging histories' in roughly Lewis's sense. 6 See Lewis (1986, 71, 208-209), (Belnap andMüller, 2010, n.4), andPercival (2013) for relevant discussion. Having mentioned the 'modal realist' view that possible worlds are concrete, I want to set that view aside here.…”

“… See Lewis (1986, 71, 208-209),Belnap and Müller (2010, n.4), andPercival (2013) for relevant discussion.…”

Entanglement as the world-making relation: distance from entanglement

“…It is left for the reader to decide whether this counts for or against entanglement as the world-making relation. See Skyrms (1976) and Percival (2013) for further discussion of the relation between possible worlds and the branching worlds of the Everett interpretation. Thank you to an anonymous reviewer of Synthese for bringing this consequence to my attention.…”