What does it mean to be alive? The arrow of time in our consciousness comes from the direction of memories. What happens if Kirk gets transported and two Kirks

What does it mean to be alive? The arrow of time in our consciousness comes from the direction of memories. What happens if Kirk gets transported and two Kirks come out the other end? The simple answer is that both are Kirk. Once their experiences diverge they will be different Kirks, but consciousness state is contained in one's memories so it can be copied, moved, time travelled, whatever.