Abstract
Alice confesses she cannot remember things before they have occurred, and after a comment of the Queen on this type of memory, Alice asks her what her favorite memories are. The Queen responds that these are the things that happened the week after next one. This strange reasoning by Lewis Carroll is a practice known by demographers: population projections are nothing but memories of what has occurred in the future, what they call following a tendency; and since they do not measure time in weeks, but in decennials and quinquennia, their memories of the future are, commonly, years ending in zero or five. Among the favorite of their memory is the year 2000. The object of these notes is to comment one of those favorite memories; projections on rural and urban populations of Mexico for the quinquennia from 1980 to 2010, produced by Leopoldo Nuñez and Lorenzo Moreno.
