标题: two logic quesions from today's test [打印本页] 作者: nini6 时间: 2003-4-29 14:38 标题: two logic quesions from today's test a expert said that one nature appearance which look like water pipe on Mars is the evidence of life on mars. while later another expert use more modern instrument showed that that appearance is not pipe. so it can be concluded that there is no life at mar. ask the weakenss in this argument . a. refuse the claim of an evidence by questioing the evidence b.only based on using more modern instrument ( the basic idea) I select a
a library has photo copy machine, which charge 10 cents for one photo. later the library bought two new digital phto machine and throw away the old one. The new machine require users to buy photo print card. which is x dollars can print x photos, the aveage price is 8 cents for one photo. the library concludes that the revenue from these machines will decreases.
ask the assumption of the library.
a . only customer who will print x photos will buy the card b. customers will used up more than 80% of the card.