Computer Models.

A computer model is actually a computer program that computes future results. The most famous computer models out there are the ones predicting global warming. There are many of the models and they have been criticized from many angles.
Without going into specific criticisms, remember, a computer model will predict what the programmer wants it to predict. If the model makes undesired predictions, the programmer assumes there is something wrong with the program and makes changes to fix the problem. I used to program for my day job, and I wrote a computer model or two over the years. Neither model produced the desired (right) answers first time I ran the code. One had a bug that I fixed, and the other never did give the "right" answers. That one showed us that a design approach we liked was never gonna work, and we changed the design. Thank goodness we were open minded enough to listen to the model and not waste money going down a blind alley.
But you gotta watch those computer models. Basically models will tell you, what you want to hear. Or what the programmer wanted you to hear. The Hadley CRU climate model, leaked to the web last year, had a single line of code that "scaled" (boosted) recent temperatures to produce the "hockey stick" graph of temperature over time.