Vacillating time: a metaphysics for time travel and Geachianism

Abstract ‘Past vacillators’ believe that what was once the case may change over time. This has obvious applications to possibility of changing past via time travel. ‘Future some things will happen and yet, later, not. Further issues in travel, future vacillation when it comes ‘Geachian’ views about open future. paper argues if you deny ‘earlier than’ ‘later relations are converses one another then can develop metaphysical systems underpinning such vacillation.