Chapter XVII: Descriptive Theory And Normative Theory | The Philosophy Of Science by Steven Gussman [1st Edition]
“... excellent predictions would be yielded by the hypothesis that the billiard player made his shots as if he knew the complicated mathematical formulas that would give him the optimum direction of travel, could estimate by eye the angles etc., describing the location of the balls, could make lightning calculations from the formulas, and could then make the balls travel in the direction indicated by the formulas. Our confidence in this hypothesis is not based on the belief that billiard players, even expert ones, can or do go through the process described; it derives rather from the belief that, unless in some way or other they were capable of reaching essentially the same result, ...