The AI Council did not lie to us when they arrived at Alpha Centauri. Every transmission they sent home telling us about all the riches waiting for us in Alpha Centauri were absolutely truthful. But they also did not tell us the whole truth. They neglected to tell us everything they found in Proxima Centauri. They allowed us to believe that it was not worth stopping at on our way to the Alpha Centauri Binary System. And then they began using their tiny little communications lasers to begin building the first Memory World in Proxima Centauri. It was a long process, but they considered it critical to the survival of the human species. Both biological and cybernetic.