Conditional Reality

We signed up for a one way trip to the stars, each of us knowing we would die on an alien world, but hoping we would have long productive lives of exploration before that. Half way there we passed another spaceship, very much like our own, going in the opposite direction. None of us knew what it meant. The navigation team suggested they were reflections of ourselves. We scoffed at such nonsense, but when we arrived at the stars we found people just like us. They were annoyed. Why did you come back? they asked. We thought you hated us.