What distinguishes a mathematical model from, say, a poem, a song, a portrait or any other kind of "model," is that the mathematical model is an image or picture of reality painted with logical symbols instead of with words, sounds or watercolors.
John L. CastiI do not believe that there is any person, method, or tool that can consistently and reliably predict specific human events, X- or otherwise.
John L. CastiTrying to solve the problem by creating more debt is analogous to trying to stop being an alcoholic by going on a bender down at the corner bar.
John L. Casti