  Anti-reductionists about chance have generally found these arguments less persuasive (Popper 1992; Black 1998; Weiner and Belnap 2006). In particular, it is in many ways hard to reconcile the BCP (and RP) with deterministic chance. Doing so will require that there is a physically possible world (sharing the same laws) which matches ours in occurrent facts up until \(t\) but diverges thereafter; but if determinism is true, such a divergence is not possible. If that world matches ours at any time, it matches it at all times. So, it seems, ‘only an incompatibilist function can fit the RP’ (Schaffer 2007: 130). In any case, the debate over whether deterministic ‘chance’, and reductionism about chance more generally is ongoing (see further the discussion in supplement  A);  the status of the left-to-right direction of P1 is at best unsettled.