一位工程师和一位逻辑学家相伴去埃及参观金字塔。到了埃及,逻辑学家在宾馆房间里写旅行日记,工程师去逛街。工程师出门不远就看见一位老妇人在卖一只黑色玩具猫,标价500美元。工程师发现猫身很重,以为是铁铸的;不过,那一对眼睛是珍珠的。于是工程师说服老人,花300美元买下了两只猫眼。回到宾馆后,工程师把这件事告诉了逻辑学家。逻辑学家连忙 An engineer and a logician accompanied to Egypt to visit the pyramids. Arrived in Egypt, logicians write travel diaries in hotel rooms and engineers go shopping. Not long after the engineer saw an old woman selling a black toy cat, priced at 500 US dollars. Engineers found that the cat was heavy and thought it was iron cast; however, the pair of eyes were pearls. So engineers persuade the elderly, spent 300 US dollars bought two cat’s eye. After returning to the hotel, the engineer told the logician about it. Logicians quickly