Suppose the pot contains $90, and your opponent makes a $10 bet. That pot now contains $100, and the cost of your call is only $10. Even if you figure your opponent to be bluffing only one time in ten, you should call. By calling, the laws of probability suggest that you’d lose a $10 bet nine times, for a loss of $90. Although you’d win only once, that pot would be worth $100. After ten such occurrences, you’d show a net profit of $10. As a result, you could say that regardless of the outcome of any particular hand, each call was worth one dollar to you.
