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1 39’
P: because new discoveries, mistaken inferences previously, discover of unnoticed, …may all indicate inadequacies in current history texts
C: history books need to frequently be revised. Reinterpretation in a manner is new and more illuminating.
Inference: the revised history books can inspire people to reinterpret in new and illuminating manner
2. 47’
P:announce that police can divert from writing ticket to crack down the illegal cars
P: however, no crack down has performed. The police claimed that efforts are diverted from writing tickets to combating the drug problem.
P: however, the tickets written are as many as before.
C: therefore no efforts were diverted to combat drugs.
【因果】桥梁。If as many as tickets were written, it is an indication of no resources were put in drug crime. If efforts were diverted to drug, the tickets written must be less.
3. P:tax of one cent can raise one billion
C: tax of fifty cent can raise fifty billion
C: deal with budget deficit
C: drop in gasoline will be good to nature, and dependence on foreign oil will reduce
therefore得出结论,两个不可比的例子。Tax of one percent gallon ---raise one billion dollars per year, 得不出tax of fifty cents per gallon---raise fifty billion dollars。 因为其他因素不可知,不能推测连个可比。
4. Which one of the following, if true, would weaken the argument?
P: a system in place of confirmation of scientific findings/replication of results by other are needed before publication
P: poor scientific work on part of anyone is not harmful
C: others conduct experiments and obtain disconfirmatory results are harmless
需要确认没有replicate才可以publish,但是careless frauds, experiments and discomfort results are harmless,所以没事,不算replication, so no harm.
削弱。直接削弱结论,careless frauds and discomfort results are essentially harmful---replicated
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