下面是关于逻辑题型的一些内容，通过例题来帮助大家认识某种题型的特点，借以解决这种题型。
归纳题
A 公司的年收入 比B高 B公司的年收入比C高 推出什么
如果A参加宴会 B就参加 如果B参加宴会 C就参加 推出什么
标志词：infer; imply; draw from support; if above true, then it is also true/must be true
The claims above, if true, most strongly support which of the following conclusions?
If the statements above are true, which of the following must also be true?
读文章方法：不关心为什么推出，只关心推导关系，即谁推出了谁。
Increase in the level of high-density lipoprotein (HDL) in the human bloodstream lower bloodstream-cholesterol levels by increasing the body’s capacity to rid itself of excess cholesterol. Levels of HDL in the bloodstream of some individuals are significantly increased by a program of regular exercise and weight reduction.
Which of the following can be correctly inferred from the statement above?
A) Individuals who are underweight do not run any risk of developing high levels of cholesterol in the bloodstream. 体重轻的胆固醇不高
B) Individuals who do not exercise regularly have a high risk of developing high levels of cholesterol in the bloodstream late in life. 不运动会胆固醇高 否命题
C) Exercise and weight reduction are the most effective methods of lowering bloodstream cholesterol levels in humans. 最有效降低的方式
D) A program of regular exercise and weight reduction lowers cholesterol levels in the bloodstream of some individuals. 项目降低胆固醇
E) Only regular exercise is necessary to decrease cholesterol level in the bloodstream of individuals of average weight.经常运动对于降低胆固醇是必要的
分析
HDL—>胆固醇降低
Program—>HDL下降
Stronger patent laws are needed to protect inventions from being pirated. With that protection, manufacturers would be encouraged to invest in the development of new products and technologies. Such investment frequently results in an increase in a manufacturer’s productivity.
Which of the following conclusions can most properly be drawn from the information above?
(A) Stronger patent laws tend to benefit financial institutions as well as manufacturers.
(B) Increased productivity in manufacturing is likely to be accompanied by the creation of more manufacturing jobs.
(C) Manufacturers will decrease investment in the development of new products and technologies unless there are stronger patent laws. 如果没有law 减少投资
增加投资如果有law 第一句的逆命题
(D) The weakness of current patent laws has been a cause of economic recession.
(E) Stronger patent laws would stimulate improvements in productivity for many manufacturers.
分析
Protectionà invest
Invest à productivity
原命题/否命题/逆命题 A—>B /A—>/B B—>A 可能不必然might be must be
命题//逆否命题 A—>B /B—>/A 必然 unless
Unless the majority of individuals have an enduring set of aspirations, it will be impossible for a legislature to craft laws that will augment the satisfaction of the citizenry.
If the majority of individuals do not have ……
除非有持久目标，否则不能制定法律。
如果没有目标，就不能制定法律
有法律—>有目标。
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