Morin de Villefranche wrote that predictions often failed without taking into account what he termed “concurrent causes.” Examination of the natal makes known what events may occur over a lifetime; the question of when is known through various timing techniques. Morin emphasized giving precedence to primary directions over solar returns and transits. Reliable prognostication requires cooperation of the aforementioned techniques with the primaries. Lacking agreement among these separate causes, an event may not occur or could occur sooner or later than forecast.