How to use open interest for prediction?

Most predictions from such figures as Nostradamus and James Van Praagh are deliberately written in a such a vague and ambiguous way as to make interpretation nearly impossible before the event, rendering them useless as predictive tools. After the event has occurred, however, details are shoehorned into the prediction by the psychics or their supporters using selective thinking — emphasize the "hits", ignore the "misses" — in order to lend credence to the prophecy and give the impression of an accurate "prediction". Inaccurate predictions are simply not mentioned.