Cash Value Test

The cash value test was William James's method for dissolving philosophical disputes that admitted no empirical settlement. Instead of arguing about whether an idea was metaphysically true, James asked what practical difference the idea made. If two beliefs produced identical consequences—if the person who held one and the person who held the other both lived the same way, made the same decisions, faced the same results—then the dispute between them had no 'cash value.' It was a difference that made no difference and could be set aside. Truth, in James's pragmatic sense, was measured not by correspondence to abstract reality but by assignable, trackable consequences in the conduct of life. An idea was true if it proved 'good in the way of belief'—useful, productive, enabling the person to navigate experience more effectively.