Real Alternate Possibilities Exist

When mere meta­phys­i­cal pos­si­bil­ity is too broad to be rel­e­vant, and actual pos­si­bil­ity is too nar­row, we turn to “real” pos­si­bil­i­ties to describe pos­si­ble worlds in which the basic prop­er­ties of the actual world obtain and in which his­tory has gone iden­ti­cally to the actual world up to a given point.

Reflect­ing on the nature of such “real pos­si­bil­i­ties” should make it obvi­ous that there are real alter­nate pos­si­bil­i­ties. That is to say that for a typ­i­cal given moment in time, there is more than one pos­si­ble world which shares a his­tory with the actual world up to that moment.

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