If I know there isn't a better choice, I just follow my decision. Duh. (Having to choose between losing $500 and losing $490 is equivalent to losing $500 and then having to choose between gaining nothing and gaining $10: yes, the loss will sadden me, but that had better have no effect on my decision, and if it does it's because of emotional hang-ups I'd rather not have. And replacing dollars with utilons wouldn't change much.)