Critical Thinking: Chapter 3 Clear Thinking, Critical Thinking and Clear Writing.

Critical Thinking: Chapter 3

Clear Thinking, Critical Thinking and Clear Writing

Organization and Focus You can’t write well if you are not

organized!

Your essay should support your position or answer anticipated objections.

Organization and Focus Use good examples!

Make your point, back it up, give an example, and then move on to your next point.

Five Good Writing Practices 1. Outlining is important. 2. Revising is very important. 3. Have someone else read your essay

and make suggestions. 4. Read your essay out loud. 5. Come back to it later.

The Principle of Focus Make clear at the outset what issue you

intend to address and what your position on the issue will be.

The Principle of Sticking to the Issue All points you make in an essay should

be connected to the issue under discussion.

The Principle of Logical Sequencing Make a point before clarifying it and

make sure your reader can discern the relationship between any given sentence and your ultimate goal.

The Principle of Completeness Support fully and adequately whatever

position you take on an issue.

Five Common Problems1. Define your terms! Any serious

attempt to support or sustain a position requires a clear statement of what is at issue. Sometimes stating what is at issue involves a careful definition of key terms.

Types of Definitions 1. Definition by example 2. Definition by synonym, and 3. Analytical definition

Definition by Example Pointing to, naming, or describing one

or more examples of something to which the defined term applies.

Example: What I mean by setting a good example is not putting your feet on the table.

Definition by Example Examples: Happiness is having your

own DVD burner. A professional bureaucrat is anyone like

our former Governor Davis, who spent a lifetime in government.

Real property? Why, your house and land are real property.

Definition by Synonym Giving another word or phrase that

means the same thing. Examples: “Poltroonery” means the

same thing as “cowardice.” “Dacha” is another word for “Russian

country house.”

Definition by Synonym Examples: “Hit me” means the same as

“Give me another card.” Being an octogenarian is being in one’s

eighties. To fledge an arrow is to fletch or feather

it.

Analytical Definition Specifying (a) the type of thing the term

applies to and (b) the difference between the things the term applies to and other things of the same type.

Example: A deciduous tree is a hardwood tree that loses its leaves during the winter.

Analytical Definition Examples: “Widow” refers to a woman

whose husband has died. Honor means being willing to lay down

your life for a just cause. Meat that contains larval worms is said

to be measly.

Five Common Problems2. Keep your word choices simple.

Good writing is often simple writing: It avoids redundancy, unnecessary complexity, and wordiness.

Example: Why write armed gunmen? Gunmen are automatically armed.

Simple Word Choices Example: Why write: “They expressed

their belief that at that point in time it would accord with their desire not to delay their departure” when all that is necessary is “They said they wanted to leave”?

Simple Word Choices Because the world is a complicated

place, the language we use to describe it often has to be correspondingly complicated. Sometimes it is necessary to be complicated to be clear. But, in general, simplicity is the best policy.

Five Common Problems3. Avoiding ambiguity. A claim is

an ambiguous claim if it can be assigned more than one meaning and if the particular meaning it should be assigned is not made clear by context.

Avoiding Ambiguity3. Avoiding ambiguity

A. Semantic ambiguity is ambiguous due to a particular word or phrase.

Examples: She disputed his claim.

Did she dispute his statement or his claim to a gold mine?

Semantic Ambiguity Example: My brother doesn’t use

glasses. What does “glasses” mean? He does not drink out of glasses or he does not have eye glasses? Avoid ambiguity by substituting an unambiguous word such as eyeglasses for glasses. Sometimes you will need several extra words.

Five Common Problems3. Avoiding ambiguity

B.Syntactic ambiguity is ambiguous because of the structure of the sentence rather than a word or phrase as with semantic ambiguity. The words are not confusing but the word order is.

Syntactic Ambiguity Example: He chased the girl in his car.

What does this mean? Did he chase a girl already inside his car? Or did he chase a girl (perhaps in another car) with his car?

Syntactic Ambiguity Example:There’s somebody in the bed

next to me. What does this mean? Whose bed? Are you in a dorm room where there are more than one bed and in another bed there is a body, or did you wake up to find someone in your bed?

Pronouns The boys chased the girls, and they

giggled a lot. Who giggled? Who does the pronoun “they” refer to?

Avoiding Ambiguity The only way to eliminate syntactic

ambiguity is to rewrite the claim. For example, “he brushed his teeth on the carpet” could be rewritten as “he brushed his teeth while standing on the carpet.”


C. A grouping ambiguity means “whenever we refer to a collection of individuals, we must clearly show whether the reference is to the collection as a group or as individuals.”

Grouping Ambiguity Example: Secretaries make more

money than physicians. Individually, no; as a group, yes. Whenever we refer to a a collection of individuals, we must clearly show whether the reference is to the collection as a group or as individuals.


D. The fallacy of composition means that we confuse when something holds true of a group of things individually then they will automatically hold true of the same things as a group.

The Fallacy of Composition Example: Sampras and Agassi are the

two best tennis players in the United States, so they would make the best doubles team. Is this true? Just because they can play best individually does not mean that if you put them together they would be the best couples team.


E. The fallacy of division is when a person who thinks that what holds true for a group will necessarily hold true of all the individuals in that group.

The Fallacy of Division Example: The Eastman School of Music

has an outstanding international reputation; therefore, so and so, who is on the faculty of Eastman, must have a good reputation. Not true. Just because you go to a good school does not mean that every teacher will be good.

Examples of Ambiguity “Priestess” was hooker to jury (AP

headline). There will be over one hundred

consolation prizes worth over $10,000. The girls played with the boys. Why you want sex changes as you age.

Analytical Definitions “Adult beverage” is anything that will get

you drunk and make you act like an adolescent.

Analytical DefinitionsSkiing—outdoor fun combined with knocking down trees with your face.

—Dave Barry

Analytical Definitions “Conservative, n. A statesman who is enamored of existing evils, as distinguished from a liberal, who wishes to replace them with others.”

—Ambrose Bierce

Five Common Problems4. Vague claims can be confused

with ambiguous claims, but they are different. Ambiguous claims can mean different things and we are unsure what to pick. Vague claims mean we are unsure of any meaning.

Vague Claims Vagueness is not really the problem so

much as an undesirable degree of vagueness. Even though a claim may be less precise than it could be, that does not mean it is less precise than is should be. It depends on what you need the information for.

Vague Claims Example: If you want to move your car

and you ask the usher how long you have until the play begins, the reply “Only a minute or two” is less precise than is possible, but it will work. It means you don’t have enough time. But you might want a more precise time if you are the lead actor in the film.

Examples of Vagueness Men burn off 438 calories per hour

gardening. Doctor: The arrhythmia you are

experiencing indicates that you should lay off jogging for awhile.

“Your satisfaction is guaranteed with our two-year limited guarantee.”

Five Common Problems5. Making faulty comparisons.

This is especially a problem with politicians and advertisers. Think about things like “Cut by up to half.” But how much really? “Now 25 percent larger.” Larger than what?

Questions for Comparisons Is important information missing? Is the same standard of comparison

being used? Are the items comparable? Is the comparison expressed as an

average?

Averages Statistics are notoriously slippery

partially because there are three different ways of talking about averages, the mean, the median, and the mode.

Mean Average The arithmetic mean of a group of

numbers is the number that results when their sum is divided by the number of members in the group.

Example: “The average grade in the class is total of all the grade points divided by the number of people in the class.”

Median Average In a group of numbers, as many

numbers of the group are larger than the median as smaller.

Example: “The average grade in the class is the halfway grade, which half the class exceeded and half the class fell short of.”

Mode Average In a group of numbers, the mode is the

number occurring most frequently. Example: The average grade in the

class is the most common grade given.”

Writing in a Diverse SocietyPart of what people have to

decide when listening to you (or reading your work) is whether or not you are credible. And using poor language lowers your credibility, just as using poor arguments does.

Writing in a Diverse Society“it is important to avoid writing in a

manner that reinforces questionable assumptions and attitudes about people…”

Writing in a Diverse SocietyThinking critically is about being

better able to think in more depth about more complex issues.

So much of our stereotypic use of language is a result of lazy thinking and easy clichés.

Exercises For each of the following, indicate whether

the definition given is by example, by synonym, or analytical.

A loquacious person is a talkative one.

Exercises For each of the following, indicate whether the

definition given is by example, by synonym, or analytical.

A loquacious person is a talkative one. By synonym



A diode is a solid-state electronic device that allows the passage of an electric current in only one direction.

Exercises For each of the following, indicate whether the definition

given is by example, by synonym, or analytical.

A diode is a solid-state electronic device that allows the passage of an electric current in only one direction.

Analytical



The oud is a stringed musical instrument shaped much like a guitar and played primarily in Middle Eastern countries.



The oud is a stringed musical instrument shaped much like a guitar and played primarily in Middle Eastern countries.

Analytical



“Epistemologist” means a philosopher or other intellectual who studies the nature of knowledge.



“Epistemologist” means a philosopher or other intellectual who studies the nature of knowledge.

Analytical



“Foppish” means “dandy.”



“Foppish” means “dandy.”

Synonym

Exercises Determine which of these claims are best

classified as semantically ambiguous (and which of those contain grouping ambiguities), which are syntactically ambiguous, and which are free from ambiguity.

Semantic ambiguity is ambiguous due to a particular word or phrase.

ExercisesSemantic ambiguity is ambiguous due to a particular word or phrase.

Syntactic ambiguity is ambiguous because of the structure of the sentence rather than a word or phrase as with semantic ambiguity. The words are not confusing but the word order is.

Exercises Determine which of these claims are best classified as

semantically ambiguous (and which of those contain grouping ambiguities), which are syntactically ambiguous, and which are free from ambiguity.

People who go shopping often go broke.



People who go shopping often go broke. Semantically ambiguous: “go

broke,” and syntactically ambiguous: does “often” go with “shopping” or with “go broke”?



All snakes are not poisonous.



All snakes are not poisonous.

Syntactically ambiguous



He went to the store but was held up in the process.



He went to the store but was held up in the process. Semantically ambiguous



The team was upset.



The team was upset. Semantical ambiguity on “upset”

and grouping ambiguity on “team”



She watched him dance with intensity.



She watched him dance with intensity. Syntactically ambiguous

Exercises Determine which of these claims are best

classified as semantically ambiguous (and which of those contain grouping ambiguities), which are syntactically ambiguous, and which are free from ambiguity.

San Francisco (AP)—“A group of citizens angry about the lack of public restrooms downtown is planning a sit-in at City Hall, leaving employees no place to go.”

Exercises San Francisco (AP)—“A group of citizens

angry about the lack of public restrooms downtown is planning a sit-in at City Hall, leaving employees no place to go.”

Semantically and syntactically ambiguous; they work together in this one.

Exercises Determine whether these claims are too vague in the

contexts that are stated or implied. During his first news conference of the year, the

president said today that his administration was going to crack down even harder on international terrorism.


contexts that are stated or implied. During his first news conference of the year, the

president said today that his administration was going to crack down even harder on international terrorism.

Too vague to be very informative; this speaks as much of an attitude as it does of plans to combat terrorism.


contexts that are stated or implied. Said at a party: “What did I think of the concert? I

thought it was pretty good. You should have been there.”


contexts that are stated or implied. Said at a party: “What did I think of the concert? I

thought it was pretty good. You should have been there.”

Fine, under the circumstances


contexts that are stated or implied. My aunt lost most of her possessions when her

house burned down last month.


contexts that are stated or implied. My aunt lost most of her possessions when her

house burned down last month. Sufficiently precise for most contexts;

too vague, of course, if the remark is directed to an insurance claims agent


contexts that are stated or implied. Well, let’s see. To get to the Woodward Mall, go

down this street a couple of blocks, and turn right. Go through several stoplights, turn left, and go just a short way. You can’t miss it.


contexts that are stated or implied. Well, let’s see. To get to the Woodward Mall, go

down this street a couple of blocks, and turn right. Go through several stoplights, turn left, and go just a short way. You can’t miss it.

Hopelessly vague


contexts that are stated or implied. I can’t tell you how much I love you. You make me

very happy.


contexts that are stated or implied. I can’t tell you how much I love you. You make me

very happy. Vagueness is not inappropriate here.


contexts that are stated or implied. Property owner, showing his property

to guests: “The lot extends back to about where that large oak tree stands.”


contexts that are stated or implied. Property owner, showing his property

to guests: “The lot extends back to about where that large oak tree stands.”

Precise enough


contexts that are stated or implied. Same property owner, showing his

property to a potential buyer: “The lot extends back to about where that large oak tree stands.”


contexts that are stated or implied. Same property owner, showing his

property to a potential buyer: “The lot extends back to about where that large oak tree stands.”

Too vague

Exercises For each of the following, give an analytical

definition that is flattering.

conservative (noun):



conservative (noun): a person whose political views are guided by the wisdom embodied in traditional institutions



politician:



politician: one dedicated to public benefit through governmental service



liberal:



liberal: a person whose political philosophy is guided by ideas of democracy, reform, and progress


definition that is unflattering.

liberal:



liberal: a politician who can’t keep out of your wallet.



conservative:



conservative: a politician who dictates to others what they can do in their bedrooms.



physicians:



physicians: people who prescribe medicines of which they know little, to cure diseases of which they know less, in human beings of whom they know nothing (attributed to Voltaire)

Critical Thinking: Chapter 3 Clear Thinking, Critical Thinking and Clear Writing.

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analytical definition

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analytical definition

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