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一、演绎推理论证法 将一个具体的事例运用到一个一般性原则从而得出结论。 论点:Demand for this product wii go up。 论据:The price of the product is sliding. 推理依据:Whenever prices of a product go down , demand for it rises. 二、定义法 界定一个概念的关键内涵;或者认定某个事物符合某个定义，从而得出结论。例如: 论点:Radical feminists are not good citizens. 论据:Radical feminists lack family values. 推理依据:Family values characterize the good citizes. 三、因果关系论证法 将一个判断放入一个因果关系中，指出它或者是原因，或者是结果。例如: 论点:The internet may be causing depression. 论据:When a group of people increased their use of the Internet , they felt depressed. 推理依据:There are no other reasons for the groups depression. 四、归纳推理论证法 从若干个具体事例中推出共性的一般结论。如: 论点:Everyone likes the movie. 论据:I know three people who like the movie. | 
