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十、常见逻辑谬误(二)

Informal Fallacies: Inductvie arguments are technically invalid, (即使前提正确也可能推出错误结论),因此”归纳推理“中论点和论据关系常被分为strong和weak。

 

Fallacies of Ambiguity

1.fallacy of equivocation

e.p. The sign said "fine for parking here".

I'm fine.

Therefore, I park here.

 

2.straw man fallacy

person A has position X

person B presents position Y (which is a distorted version of X)

person B attacks position Y

Therefore X is false/incorrect/flawed.

 

e.p. Bill: We should clean out the closets. They are getting a bit messy.

Joe: Why? We just went through those closets last month. Do we have to clean them out everyday?

Bill: I never said anything about doing that every day! You just want to keep all your junk forever, which is ridiculous! (Bill说应该搞卫生了(X),Joe反驳说难道我们应该天天搞卫生吗(Y)将X概念换成了Y概念,攻击Y概念)

 

Fallacies of Presumption

1.false dilemma

故意创造出either...or...两分情景,实际上还有第三种选择。

 

2.slippery slope

“一个马蹄铁导致国家灭亡的故事”

A导致B,B导致C,C导致......所以A最终会导致Z。其中的关联性都只是“probably”而没有紧密必然性。

 

3.begging the question 循环论证(结论已经包含在前提中)

e.p. God exist.

How do you know?

Coz the Bible says so.

Why should I trust the Bible?
Because it's the words of God!

 

4.Post hoc(fallacy of false cause)

发生在后的事件一定“某”个发生在前的事件导致的(也许是某一些或...)

 

5. Texas Sharpshooter

“你看到的是你最想看到的事实”

刻意拿出部分数据来证明两件事之间的相关性,其实在全部样本之下两件事之间关系并不紧密。

 

Fallacies of Relevance

e.p. appeal to antiquity(传统这么做是对的,所以现在做依然是对的)/novelty/authority(用一个领域专家的话去论证另一个领域是对的)/popularity/...

Bandwagon (一件事情被越来越多的人认为是对的)

 

书籍推荐

《Proofiness by Charles Seife》

《The Black Swan by Nassim Nicholas Taleb》

《Love is Fallacy》(a passage picked from a textbook)

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九、常见的逻辑谬误(一)

Arguments: premises, inferences and conclusions. 前提,推理过程,结论

 

Logical Fallacy

“推理过程”错误或“前提”错误

 

Formal Fallacies(deductive)

valid: sound//unsound

invalid

 

Informal Fallacies(inductive)

Inductive Arguments are by nature Fallacious

Fallacies of Ambiguity/Relevance/Presumption

 

Formal: propositional fallacies 复合命题式

affriming a disjunct: X or Y; X, therefore not Y.

“小明成功既可以是因为他有才能,也可以是他人脉好。小明有才能,因此他人脉不好。”

“有才能”和“人脉好”不是完全对立的,可以同时存在。

affirming the consequent: if X, then Y; Y, therefore X.

“如果小明考试作弊,那他就能及格;现在小明及格了,说明他考试作弊了”

X不是Y的充分条件。
denying the antecedent: if X; then Y; not X, therefore not Y.

......

 

syllogistic fallacies 三段论式

affirmative: a. all X is Y // i: some X is Y

negative: e. no X is Y // o: some X is not Y

 

 

1.illicit affirmative: both premises are affirmative but has a negative conclusion.

e.p. All movie stars are rich.

Some rich people are mean.

Therefore, some movie stars are not mean.

 

2.illicit negative: 结论肯定,至少有一个否定前提。

e.p. We are not rich people.

Rich people don't care about poor people.

Therefore, we care about poor people.

 

3.illicit major

e.p. All X are Y

No Z are X

Therefore, no Y is Z. (大前提的Y不代表Y的全部性质,而结论的Y代表全部)

 

4.illicit minor

e.p. All X are Y

All X are Z

Therefore, all Z are Y. (小前提中的Z不代表Z的全部性质,而结论的Z却代表了全部)

 

5.undistributed middle

e.p. All cats are mammals

All dogs are mammals

Therefore, all cats are dogs. (中项mammals对于大前提cats和小前提dogs的对应部分不完全重叠,而结论把这部分完全重叠了)

 

6. four terms

e.p. Nothing is better than ture love.

Money is better than nothing.

Therefore, money is better than ture love. (大前提和小前提的nothing不是同一个term,这里一共有四个terms)

 

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八、Deductive and Inductive Argument

演绎论证和归纳论证

1.演绎论证(从广泛到个例)

Conclusion necessarily follows from premises.

→形式和过程是否合理

 

Assuming the premises be ture, does the conclusion follow?

(valid有效 [sound 前提和论证都真 or unsound 前提不真]

or

invalid)
 

2.归纳论证(从个例到广泛)

Conclusion probably follows from premises.
→可能性有多高

(weak

or

strong)

看3:50时的课件吧,更清晰。。

 

e.p. of weak inductive argument:

1.overgeneralization

"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe. -Albert Einstein"

世人在我面前皆愚蠢,但不一定世人在别人面前也都是愚蠢的。

“Be who you are and say what you feel, because those who mind don't matter, and those who matter don't mind. -Bernard M.Baruch”

既matter又mind :你老板,你老爸老妈......

2.anomalies 看名人传记,所以就去做名人做过的事

3.false causality 以其中的一个影响因素概括了全部因素

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七、An Introduction to Argument

Don't raise your voice, improve your argument.

-Desmond Tutu

 

deductive 演绎

inductive 归纳

 

argument→burden of proof 论证的“观点”是啥

1.claim: fact(ture or false)/

opinion(right or wrong)

 

2.premises:evidence(direct or indirect)/

reasoning(inductive or deductive)

 

 

What makes a non-argument?

1.emotional discourse 情绪型争吵

2.fictions

(Even though good fiction has a good internal logic, there is usually no proof involved.

The work of fiction, as a whole, can be thought of as a large conditional statement.

If {we assume characters, plot...} then  {such statements logically follow}.  ) 

3.conditional statements 条件句

4.explanations 解释(对方已经认同此事实,解释它是如何发展至此的)

argument 辩论(对方不清楚此事实的真假,所以要用论证来说服对方)

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六、图表题

tables 表格

figures 图

 

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五、识别作者的目的、态度和语气

determined 坚定的

 

漫画的主要话题是?
漫画一般是以幽默的形式反讽

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四、篇章中的推理

分清一句话的主句和从句,main idea来自主句和主要分句。

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三、词义猜测与理解

词汇是硬件,语法是软件

1.根据上下文猜测

转折对比:serious/frivolous

同义复述:perusal/study

反义复述:creative/unimaginative

背景常识

举例暗示

逻辑推理

2.根据词根词缀猜测

acro- 顶点,最高点

chron(o)- 时间

dipl(o)- 双,复

dys- 坏的,反常的

eu- 好,真

hect- 多,百

holo- 完全

hyp(o)- 在...之下

neo- 新

omni- 全,总

mono- 单

poly- 多

uni- 单

-phobia 对...恐惧或憎恶

-ple 倍(的)

patho- 病

 

denotation/connotation 字面义/yin'han'yi

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二、从语句到段落

1.语言衔接

连接词与过渡词

如and, or, then, however, in fact, consequently, eventually.

表罗列to begin with

for one thing, for another...

表补充additionally

moreover

apart from...

furthermore

表对比in spite of

表类比in the same way

 

apathy/listlessness 无力

photosynthesis 光合作用

Questions define tasks/express problems/ and delineate issues.

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一、话题、主题思想和主题句

 

选择题

话题topic:概括文章主题的词或词组

主题思想main idea:作者对话题的观点

主题句topic sentence:表现主题思想的句子

 

比喻:topic就是给一块地,main idea就是作者在这块地上砌的房子。

 

演讲时不是拿到topic就把方方面面有关的ideas都加到演讲稿里,而是选定一个main idea。

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frank

neutral

unemotional

boastful

envious

insulting

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1.转折对比线索

常用转折词:句子中的生词根据句意相反猜测

2.同义复述线索

常用过渡词语:过渡词前后的句意相同,由此推断生词的意思

有时不会直接进行同义复述,转折词不一定代表前后两个词的转折,可能是句意的转折

3.反义复述线索

常用过渡词

4.背景常识线索

5.举例暗示线索

6.逻辑推理线索

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选择给定位置的题  若是在段首 必是总领句6 而且前面讲过的内容后面不会再讲了

 

细节题可以圈出关键词方便查阅1  细节满篇跑

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read and create不是写作文  其实是question &answer   是一个问答题  考察你都不读得懂  70到 80%都是客观回答这个问题 主要去了解背景 作者信息 主要大意 尽量不要去读汉语版  难懂的可以先读汉语   

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12题的答案都在文章里面  但不能照抄 

不求全面 找到一两个相关 有话可说的点即可   自由发挥的空间大   必须用自己的话解答

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