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.
