1.1.1.7. A good is not better because it is more necessary.

"Many economists claim that in any free exchange each party must think that they are getting something better out of the deal. But people are not such fools. A widow who sells her wedding ring in order to buy food is fully aware that her ring is better than the food, but she also realizes that food is more necessary. Far from being pleased at the ‘free’ exchange giving her something better, she is sad that cruel necessity forces her to exchange the better for the worse."