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While the fundamental laws of physics are timereversal invariant, most macroscopic processes are irreversible. Given that the fundamental laws are taken to underpin all other processes, how can the fundamental timesymmetry be reconciled with the asymmetry manifest elsewhere? In statistical mechanics, progress can be made with this question. What I dub the ‘Zwanzig–Zeh–Wallace framework’ can be used to construct the irreversible equations of SM from the underlying microdynamics. Yet this framework uses coarsegraining, a procedure that has faced much criticism. I (...) 

This paper considers the following question: what is the relationship between supervenience and reduction? I investigate this formally, first by introducing a recent argument by Christian List to the effect that one can have supervenience without reduction; then by considering how the notion of Nagelian reduction can be related to the formal apparatus of definability and translation theory; then by showing how, in the context of propositional theories, topological constraints on supervenience serve to enforce reducibility; and finally, how constraints derived (...) 

This exploratory paper discusses a somewhat heterodox metaphysical theory of consciousness: the “manyworlds theory”. The theory gives up the common assumption that all conscious experiences are features of one and the same world and asserts instead that different conscious subjects are associated with different “firstpersonally centred worlds”. We can think of these as distinct and “parallel” firstpersonal realizers of a shared “thirdpersonal world”. This is combined with a form of modal realism, according to which different subjects’ firstpersonally centred worlds are (...) 