This question has been raised about a year ago without a satisfactory answer. Perhaps second time is the charm. The question is: when borders expand, how is the specific tile that is added to the city chosen? I have encountered repeated instances when the city screen suggested that borders will expand to a certain tile only to have it changed later on to a different tile. This suggest a random ingredient in the tile selection algorithm. If true, why is that? Does anyone have insight? Or can point me in the right direction?