An Irishman was terribly overweight, so his doctor put him on a diet.
"I want you to eat regularly for two days, then skip a day, then eat regularly again for two days, then skip a day....and repeat this procedure for two weeks. The next time I see you, you should have lost at least 5 lbs." 「我要你連續兩天正常進食，跳一天，然後正常進食兩天，如此進行兩個星期。下次來見我時，你應該起碼可以減五磅。」
When the Irishman returned he shocked the doctor by having lost 30lbs.