IANAP, but it seems the past is only being modified if being a particle or a wave is a choice, meaning the two are mutually exclusive states. I always thought

IANAP, but it seems the past is only being modified if being a particle or a wave is a choice, meaning the two are mutually exclusive states. I always thought that particles are waves at the same time, not that they switch depending on measurement. Or rather, they are a deeper concept that unifies particles and waves, and the way they are expressed at measurement time depends on whether you plug in a ParticleReader or WaveReader. "Was it a particle or wave when it passed by the mirror?" That sounds like a poorly conceived question to me; it is probably better to think of it as neither. EDIT: Or, what Joan Vaccaro said...