ion an expert may have, but it unable to put into words. It allows one to refine ones theories about outcomes based on what has actually occurred, in practical use, it works well.There are some that say its ineffective for the very reason it has gained much favor, but for many it serves a useful purpose in mathematical thinking. A amateur mathematician changed the was we see and calculate probabilities, and had it not been for his friend, Richard Price, who sent his essays to the Royal Society after his death, we would be without this very useful theory....