Lsat: Logical Reasoning Flashcards
Premise Indicator Words
Because, since, for, for example, for the reason that, in that, given that, as indicated by, due to, owing to, this can be seen from, we know this by.
Conclusion Indicator Words
Thus, therefore, hence, consequently, as a result, so, accordingly, clearly, must be that, shows that, conclude that, follows that, for this reason.
One of their favorite forms places a conclusion indicator and premise indicator back to back such as
Therefore, since
Thus, because
Hence, due to
Additional Premise Indicator
Furthermore, moreover, besides, in addition, what’s more.
Counter Premise Indicators
But, yet, however, on the other hand, admittedly, in contrast, although, even though, still, whereas, in spite of, despite, after all.
Simple arguments include
Premise and Conclusion
Complex arguments include
Premise and conclusion/premise and conclusion.
Single speaker stimulus words to introduce alternate point of view.
Some people propose, many people believe, some argue that, some people argue that, some critics claim, some critics maintain, some scientists believe.
Quantity Indicator Words
All, every, most, some, several, few, sole, only, none, not all.
Probability Indicator words
Must, will, always, not always, probably, likely, should, would, not necessarily, could, rarely, never.
Must be true/Most supported definition
Must be true questions ask you to identify the answer choice that is best proven by the information in the stimulus.
“If the statements above are true, which one of the following must also be true?”
Must be true
“Which one of the following can be properly inferred from the passage?”
Must be true
Main point Definition
Main point questions ask you to find the primary conclusion made by the author.
“The main point of the argument is that”
Main point.
Point at issue
Point at issue questions require you to identify a point of contention between two speakers and thus these questions appear most exclusively with two speakers.
“Larew and Mendota disagree about whether.”
Point at issue.
Assumption question definition
Ask you to identify an assumption of the author’s argument.
“Which of the following is an assumption required by the argument above?”
Necessary Assumption
Justify the conclusion definition
Ask you to supply a piece of information that, when added to the premises, proves the conclusion.
Which one of the following, if assumed, allows the conclusion above to be properly be drawn?”
Justify the conclusion.
Strengthen/Support Definition
Ask you to select the answer choice that provides support for the author’s argument or strengthens it some way.
“Which one of the following, if true, most strengthens the argument?”
Strengthen/Support
“Which one of the following, if true, most strongly supports the statements above?”
Strengthen/support
Resolve the paradox definition
You must find the answer choice that best resolves the contradiction or discrepancy.
Weaken Definition
Weaken questions ask you to attack or undermine the author’s argument.
Which of the following, if true, most seriously weakens the argument?
Weaken
Method of reasoning definition
Ask you to describe, in abstract terms, the way in which the author made his or her argument.
“Which one of the following describes the technique of reasoning used above?”
Method of reasoning.
Flaw in the Reasoning
Ask you to describe, in abstract terms, the error of reasoning committed by authors.
“The reasoning in the astronomer’s argument is flawed because this argument.”
Flaw in the Reasoning
Parallel Reasoning
Ask you to identify the answer choice that contains reasoning that is most similar in structure to the reasoning presented in the stimulus.
“Which one of the following arguments is most similar in its pattern of reasoning to the argument above?”
Parallel Reasoning
Evaluate the Argument Definition
You must decide which answer choice will allow you to determine the logical validity of the argument.
“The answer to which one of the following questions would contribute most to an evaluation of the argument?”
Evaluate the argument
Cannot be true definition
Ask you to identify the answer choice that cannot be true or is most weakened based on the information in the stimulus.
“If the statements above are true, which one of the following cannot be true?”
Cannot be true.
Family #1
Must be true, main point, point at issue, method of reasoning, flaw in the reasoning, parallel reasoning.
Family #2
Assumption, justify the conclusion, strengthen/support, resolve the paradox.
Family #3
Weaken
Family #4
Cannot be true.
One of the signature features of the four question families is
That they define the parameters of what you can do with the information in each question.
First Family rule #1
- You must accept the stimulus information - even if it contains an error of reasoning-and use it to prove that one of the answer choices must be true.
First Family Rule #2
- Any information in answer choice that does not appear either directly in the stimulus or as combination of items in the stimulus will be incorrect.
Second Family Rule #1
The information in the stimulus is suspect. There are often reasoning errors present, and depending on the question you will help shore up the argument in some way.
Second Family #2
The answer choices are accepted as given, even if they influence “new” information. Your task is to determine which answer choice best meets the question posed in the stem.
Third Question Family rule #1
- The information in the stimulus is suspect. There are often reasoning errors present, and you will further weaken the argument in some way.
Third Question Family #2
- The answer choices are accepted as given, even if they include “new” information. Your task is to determine which answer choice best attacks the argument in the stimulus.
Fourth Family Rule. #1
You must accept the stimulus information- even if it contains an error of reasoning - and use it to prove that one of the answer choices cannot occur.
Fourth Family rule #2
Any information in answer choice that does not appear either directly in the stimulus or as a combination of items in the stimulus will be incorrect. The correct answer choice will directly disagree with the stimulus or a consequence of the stimulus.
The true effect of “except” is to
Logically negate the question stem.
Least has a similar effect to
Except when it appears in a question stem. Logically negates the question stem.
In must be true the correct answer can be proven by
Referring to the facts stated in the stimulus.
“If the statements above are true, which one of the following must also be true?”
Must be true
“If the information above is correct, which one of the following conclusions can be drawn properly drawn on the basis of it?”
Must be true
“The statements above, if true, most strongly support which one of the following?”
Must be true
“Which one of the following can be properly inferred from the passage?”
Must be true
“Which one of the following is most strongly supported by the information above?”
Must be true
You can often predict the occurrence of must be true questions because
The stimulus does not contain a conclusion.
“Many” can include
All
Most is not the same as
Many
Two answers that will always be correct in must be true questions.
- Paraphrased answers.
- Answers that are the sum of two or more stimulus statements. (Combination answers)
Must be True
Paraphrased answer choices.
Paraphrased answers are answers that rewrite a portion of the stimulus in different terms. When the answers mirror the stimulus, they are correct.
Most students have an unstated expectation of the conclusion appearing in the last sentence, and the test makers are able to prey upon this expectation by
(Main point questions)
Creating wrong answers that paraphrase the last sentence of the stimulus. To avoid this trap, simply avoid assuming the last sentence is the conclusion.
“Which one of the following most accurately expresses the main conclusion of the argument?”
Main point
“Which one of the following most accurately expresses the conclusion of the journalist’s argument?
Main point
“Which one of the following most accurately restates the main point of the passage?”
Main point
“The main point of the argument is that”
Main point
Main point
Correct answer choice
Answers that paraphrase the conclusion are correct in main point questions.
If an argument contains two conclusions you will be forced into identify,
Main point.
which one is the main conclusion and which one is the subsidiary conclusion.
In every case you should fill in the blank with the
(Fill in the blank)
Main point of the argument. In order to achieve this goal, you must read the stimulus for clues revealing the direction of the argument and the author’s intent.
Conditional reasoning
Is the broad name given to logical relationships composed of sufficient and necessary conditions. Any conditional statement consists of at least one sufficient condition and one necessary condition.
Sufficient Condition
Can be defined as an event or circumstance whose occurrence indicates that a necessary condition must also occur.
Necessary condition
Can be defined as an event or circumstance whose occurrence is required in order for a sufficient condition to occur.
If a sufficient condition occurs, you automatically know that
The necessary condition also occurs. If a necessary condition occurs, then it is possible but not certain that the sufficient condition will occur.
Three logical features of conditional reasoning
- The sufficient condition does not make the necessary condition occur.
- Temporally speaking, either condition can occur first, or two can occur at the same time.
- The conditional relationship stated does not have to reflect reality.
The sufficient condition does not make the the necessary condition occur. The sufficient condition does not
Actively cause the necessary condition to happen. In a conditional statement the occurrence of the sufficient condition is a sign or indicator that the necessary condition will occur, is occurring, or has already occurred.
Conditional reasoning occurs when a statement containing
Sufficient and necessary conditions is used to draw a conclusion based on the statement.
A+ ———> study
—————————————————
John received an A+ on the test, so he must have studied.
A+ ——-> study
(Repeat form)
A+ ————> study
—————————————————
John studied for the test, so he must have received an A+ on the test.
Study —————-> A + (invalid)
MISTAKEN REVERSAL
A+ ————-> study
—————————————————
John did not receive an A+ on the test, so he must not have studied.
~A+ ———> ~study (invalid)
MISTAKEN NEGATION
A+ ————-> study
—————————————————
John did not study for the test, so he must not have received an A+.
~study —————> ~A+
The repeat form simply
Restates the elements in the original order they appeared. This creates a valid inference.
A mistaken reversal switches the elements in the
Sufficient and necessary conditions, creating a statement that does not have to be true.
A mistaken negation negates both conditions, therefore creating a
Statement that does not have to be true.
A contrapositive denied the necessary condition, thereby making it
Impossible for the sufficient condition to occur.
Sufficient Condition Indicator
If, when, whenever, every, all, any, people who, in order to.
Necessary Condition Indicator
Then, only, only if, must, required, unless, except, until, without.
In the case of unless, except, until, and without, a special two step process called the unless equation is applied to the diagram.
- Whatever terms is modified by “unless”, “except”, “until”, or “without” becomes the necessary condition.
- The remaining term is negated and becomes the sufficient condition.
To diagram a statement that contains “unless”,
Convert the variable modified by “unless” into the necessary condition. Take the remainder, negate it, and convert it to the sufficient condition. The same technique applies to statements that contain “until”, “except”, and “without.”
“No” and “None” at the beginning modifies the
Necessary condition.
“When” introduces the
Sufficient condition.
When a stimulus contains conditional reasoning is combined with a must be true question stem
Immediately look for the repeat or contrapositive in the answer choices.
Statement 1: A —-> B
Statement 2: B —-> C
Chain: ?
Inference: ?
Chain: A ——> B ——>C
Inference: A ——> C
“Only” indicates a necessary condition when it is
Before a noun or phrase that must be true for another condition to hold.
As a modifier (not logical): “only” acts a modifier or adjective when it
Emphasizes or limits a noun without establishing a conditional relationship.
Ex: Mars has only small moons.”
When “only” modifies a noun without setting up a logical condition,
It is not functioning as necessary condition indicator.
F some A —-> LH <——-|—-> H
Every author works long hours, and if you work long hours you are never happy. Some authors are female.
Inferences: ?
Inferences: F some LH
F some ~H
A <———|——> H
The single arrow ——>
Introduced by sufficient and necessary words such as:
If, then, when, all, every, and only.
All X’s are Y’s
X ——> Y
~Y ——> ~X
The double arrow <———->
Introduced by
“If and only if” or by situations where the author implies that the arrow goes “both way”, such as by adding vice versa. After a conditional statement.
X if and only if Y
X <———-> Y
All W’s are Z’s, and all Z’s are W’s
W <—————> Z
Double arrow statements allow for only two possible outcomes:
The two variables occur together, or neither of the two variables occur.
The double- Not arrow <——|——>
Introduced by conditional statements where one of the terms is
Negative or by statements using words such as “no” and “none” that imply the two variables cannot “go together.”
No X’s are Y’s
X <————|——-—-> Y
If you are a T, then you are not a V,
T <———|———> V
T———> ~V
The word some can be defined as
At least one, possibly all.
Some are Not can be defined as
At least one is not, possibly all are not.
Some are not =
Not all
Some Indicators
Some, at least some, a few, a number, several, part of, a portion.
The word most can be defined as
Majority, possibly all. Most includes the possibility of all.
Most are not can be defined as
Majority are not, possibly all are not,
Most indicators
Most, majority, more than half, almost all, usually, typically.
All =
Most =
Some are not =
Most are not =
Some =
None =
Numerically
All = 100
Most = 51 to 100 (a majority)
Some are not = 0 to 99 (not all)
Most are not = 0 to 49
Some = 1 to 100 (“at least one”)
None = 0
Reversible statement are easily identifiable because
The relationship symbol is symmetrical and does not include an arrow pointing in one direction.
Non reversible terms have an arrow pointing
In just one direction.
Reversible relationships include
None <———-|———->
Some
Double arrow <———->
Non-reversible Relationship
All (——>)
Most |most. |
| ——->|
Additive inferences result from
Combining multiple statements through a common term and then deducing a relationship that does not include the common term.
Inherent inferences follow from
A single statement such as A——>B, and they are inferences that are known to be true simply from the relationship between the two variables.
When the arrow goes both ways,
You can infer most and some are inherent.
The negative logic ladder
None
|
V
Most are Not
|
V
Some are Not
The negative logic ladder
None
|
V
Most are Not
|
V
Some are Not
Variables that are linked in only one relationship are
Open
Variables that are linked in two or more relationships are
Closed.
Combine these terms
A some B
B——-> C
A some B ——> C
The vast majority of additive inferences require either
All or none statements in the chain.
Because all or none statements affect the entire group under discussion,
They are very restrictive and thus when other variables are joined to these relationships then inferences often result.
When looking to make inferences, do not start with
A variable involved in a double not arrow relationship and then try to go across the double not arrow.
The some train
To make an inference with a variable involved in a some relationship, an arrow
Leading away from the some relationship is required.
A some B —-> C
Inference:?
A some C
In the some train each variable is
Considered a station, and the relationships between each variable is a track.
A successful journey on the some train consists of at least
Two stops, and yields an inference. An unsuccessful journey means no inference is present.
The most train is similar to the some train, but because most is one step higher on the logic ladder,
The most train produces stronger inferences.
The critical difference between the some train and most train is that because most has direction
You can only follow the most arrow to make a most inference.
If you go backwards against the most arrow
It devolved the relationship to some, which is the inherent inference.
In general, two consecutive some’s, two consecutive most’s, or a some and most in succession will
Not yield any inferences.
For each argument, identify the conclusion and the premise(s). “Given that the price of steel is rising, we will no longer be able to offer discounts on our car parts.”
Features the premise indicator “given that.”
Premise: “Given that the price of steel is rising,”
Conclusion: “we will no longer be able to offer discounts on our car
parts.”
For each argument, identify the conclusion and the premise(s). “The political situation in Somalia is unstable owing to the ability of individual warlords to maintain powerful armed forces.”
Features the premise indicator “owing to.”
Premise: “owing to the ability of individual warlords to maintain
powerful armed forces.”
Conclusion: “The political situation in Somalia is unstable”
For each argument, identify the conclusion and the premise(s). “Since we need to have many different interests to sustain us, the scientists’ belief must be incorrect.”
Features the premise indicator “since.”
Premise: “Since we need to have many different interests to sustain
us,”
Conclusion: “the scientists’ belief must be incorrect.”
For each argument, identify the conclusion and the premise(s). “So, as indicated by the newly released data, we should push forward with our efforts to recolonize the forest with snowy tree crickets.”
Features the conclusion/premise form indicator “So, as indicated by.” Premise: “as indicated by the newly released data”
Conclusion: “we should push forward with our efforts to recolonize the
forest with snowy tree crickets.”
Either/Or definition
At least one of the two. Possibly both.
The way test makers indicate that the items in two conditions cannot both occur.
(Either/Or)
“But not both”
Either/Or are diagrammed by
Negate the sufficient condition.
Whenever you take the contrapositive of a statement with multiple terms in the sufficient or necessary condition,
“And”, turns into “or”, and “or” turns into “and”
“Or” contrapositive is
“And”
“And” contrapositive is
“Or”
The double arrow indicates that
Two terms must always occur together.
Biconditionals indicate each term is
Both sufficient and necessary for the other.
Terms in double arrow relationships either occur
Together or both do not occur.
The double arrow is typically introduced in any of the following three ways:
- Use of phrase “If and only if”
- Use of the phrase “Vice Versa”
- By repeating and reversing the terms.
The double not arrow is similar to the
“Not equal” sign of logic, the two terms at the end of the sign cannot be selected at the same time.
Weaken questions require
you to select the answer choice that undermines the author’s argument as decisively as possible.
The stimulus will contain an argument. Because you are asked to weaken the author’s reasoning, and reasoning requires a conclusion, an argument will always be present. In order to maximize your chances of success you must
identify, isolate, and assess the premises and the conclusion of the argument. Only by understanding the structure of the argument can you gain the perspective necessary to attack the author’s position.
Almost all correct Weaken answer choices impact the
conclusion. The more you know about the specifics of the conclusion, the better armed you will be to differentiate between correct and incorrect answers.
Weaken questions often yield strong
prephrases. Be sure to actively consider the range of possible answers before proceeding to the answer choices.
The stem uses the word “weaken” or a synonym. Following are some examples of words or phrases used to indicate that your task is to weaken the argument:
weaken, attack, refute, undermine, argue against, call into question, cast doubt, challenge, damage, counter.
“Which one of the following, if true, most seriously weakens the argument?”
Weaken
“Which one of the following, if shown to be a realistic possibility, would undermine the argument?”
Weaken
“Which one of the following, if true, most undermines the researcher’s argument?”
Weaken
“Which one of the following, if true, would most call into question the analysts’ explanation of the price increase?”
Weaken
“Which one of the following, if true, could be used by Cora to counter Bernard’s rejection of her explanation?”
Weaken
“Which one of the following, if true, is the strongest logical counter parent P can make to parent Q’s objection?”
Weaken
“Which one of the following, if true, most calls into question the claim above?”
Weaken
In practice, almost all correct LSAT Weaken question answers leave the
premises untouched.
The key to weakening an LSAT argument is to
attack the conclusion.
In weaken questions the conclusion is the part of the argument that is most likely to be attacked, but the correct answer choice will not simply contradict the conclusion. Instead, the correct answer will
undermine the conclusion by showing that the conclusion fails to account for some element or possibility. In this sense, the correct answer often shows that the conclusion does not necessarily follow from the premises even if the premises are true.
Answers that weaken the argument’s conclusion will attack
assumptions made by the author.
Common Weakening Scenarios
- Incomplete Information. The author fails to consider all of the possibilities, or relies upon evidence that is incomplete. This flaw can be attacked by bringing up new possibilities or information.
- Improper Comparison. The author attempts to compare two or more items that are essentially different.
- Qualified Conclusion. The author qualifies or limits the conclusion in such a way as to leave the argument open to attack.
The stimuli for weaken questions contain errors of
assumption.
To weaken a conditional conclusion, attack the
necessary condition by showing that the necessary condition does not need to occur in order for the sufficient condition to occur.
To weaken a conditional conclusion, attack the necessary condition by showing that the necessary condition does not need to occur in order for the sufficient condition to occur.
This can be achieved by presenting a counterexample or by presenting information that shows that the sufficient condition can occur without the necessary condition.
When you have conditional reasoning in the stimulus and a Weaken question, immediately look for
an answer that attacks the necessary condition.
Keep these fundamental rules in mind when you approach Weaken questions:
- The stimulus will contain an argument.
- Focus on the conclusion.
- The information in the stimulus is suspect. There are often reasoning errors present, and you must read the argument very carefully.
- Weaken questions often yield strong prephrases.
- The answer choices are accepted as given, even if they include “new” information.
Several scenarios that can occur in LSAT Weaken question stimuli are easy to
recognize and attack
- Incomplete information
- Improper comparison
- Qualified Conclusion
There are certain incorrect answer choices that appear frequently in weaken questions:
- opposite answers
- shell game answers
- out of scope
MOST causal conclusions are flawed because
there can be alternate explanations for the stated relationship: another cause could account for the effect; a third event could have caused both the stated cause and effect; the situation may in fact be reversed; the events may be related but not causally; or the entire occurrence could be the result of chance.
causality occurs when
one event is said to make another occur. The cause is the event that makes the other occur; the effect is the event that follows from the cause.
the cause must occur
before the effect, and the cause is the “activator” or “ignitor” in the relationship. The effect always happens at some point in time after the cause.
A cause-and-effect relationship has a signature characteristic
the cause makes the effect happen.
The following terms often introduce a cause and effect relationship:
Caused by, because of, responsible for, reason for, leads to, induced by, promoted by, determined by, produced by, product of, played a role in, was a factor in, is an effect of.
The Difference Between Causality and Conditionality
- The chronology of the two events can differ.
- The connection between the events is different.
- The language used to introduce the statements is different.
In cause and effect statements there is an implied temporal relationship: the cause must
happen first and the effect must happen at some point in time after the cause.
In sufficient and necessary statements there is no implied temporal relationship: the sufficient condition can
happen before, at the same time, or after the necessary condition.
In cause and effect statements the events are
related in a direct way.
In conditional statements the sufficient and necessary conditions are often related directly, but
they do not have to be.
Causal indicators are active, almost powerful words, whereas
most conditional indicators do not possess those traits.
Causal statements can be found in the
premise or conclusion of an argument.
If the causal statement is the conclusion, then
the reasoning is flawed.
If the causal statement is the premise, then the argument
may be flawed, but not because of the causal statement.
one of the critical issues in determining whether flawed causal reasoning is present is
identifying where in the argument the causal assertion is made.
The classic mistaken cause and effect reasoning is when
a causal assertion is made in the conclusion, or the conclusion presumes a causal relationship.
If a causal claim is made in the premises, however, then
no causal reasoning error exists in the argument.
There are two scenarios that tend to lead to causal conclusions in Logical Reasoning questions:
- One event occurs before another
- Two (or more) events occur at the same time
When one event occurs before another event, many people fall into the trap of assuming that
the first event caused the second event. This does not have to be the case.
When two events occur simultaneously, many people assume that
one event caused the other. While one event could have caused the other, the two events could be the result of a third event, or the two events could simply be correlated but one does not cause the other.
Understanding the assumption that is at the heart of a causal conclusion is essential to
knowing why certain answers will be correct or incorrect.
When an LSAT speaker concludes that one occurrence caused another, that speaker also assumes that
the stated cause is the only possible cause of the effect and that consequently the stated cause will always produce the effect. This assumption is incredibly extreme and far- reaching, and often leads to surprising answer choices that would appear incorrect unless you understand this assumption.
The conclusion is flawed because it is not necessary that the one element caused the other to occur:
the two could simply be correlated in some way or the connection could be random.
Thus, in every argument with a causal conclusion that appears on the LSAT, the speaker believes that
the stated cause is in fact the only cause and all other theoretically possible causes are not, in fact, actual causes.
Whenever you identify a causal relationship in the conclusion of an LSAT problem, immediately prepare to
either weaken or strengthen the argument.
Attacking a cause and effect relationship in Weaken questions almost always consists of performing one of the following tasks:
A. Find an alternate cause for the stated effect
B. Show that even when the cause occurs, the effect does not occur.
C. Show that although the effect occurs, the cause did not occur.
D. Show that the stated relationship is reversed
E. Show that a statistical problem exists with the data used to make the causal statement.
If the data used to make a causal statement is in error, then
the validity of the causal claim is in question.
Causality occurs when
one event is said to make another occur.
The cause is the event that
makes the other occur.
the effect is the event that
follows from the cause.
Keep these fundamental rules in mind when approaching Strengthen, Justify the Conclusion, and Assumption questions:
- The stimulus will contain an argument. Because you are being asked about the author’s reasoning, and reasoning requires a conclusion, an argument will always be present.
- Focus on the conclusion. Almost all correct answer choices impact the conclusion.
- The information in the stimulus is suspect. There are often reasoning errors present, and you must read the argument very carefully in order to know how to shore up the argument.
- These questions often yield strong prephrases. Make sure you actively consider the range of possible answers before proceeding to the answer choices.
- The answer choices are accepted as given, even if they include “new” information. Like Weaken questions, the answer choices to the problems in this chapter can bring into consideration information outside of or tangential to the stimulus.
The Difference Between Strengthen, Justify the Conclusion, and Assumption Questions
Strengthen questions ask you to support the argument in any way possible. This type of answer has great range, as the additional support provided by the answer choice could be relatively minor or major.
Justify the Conclusion questions ask you to strengthen the argument so powerfully that the conclusion is made logical. Compared to a Strengthen question, the answer to a Justify question must strengthen the conclusion so it is 100% proven; anything less and the answer choice is incorrect.
Assumption questions ask you to identify a statement that the argument assumes or supposes.
Speaking in numerical terms, any answer choice that strengthens the argument, whether by
1% or by 100%, is correct.
The correct answer to a Justify the Conclusion question is
sufficient to prove the conclusion when added to the premises.
Assumption questions ask you to identify a statement that
the argument assumes or supposes. An assumption is simply an unstated premise— what must be true in order for the argument to be true.
Strengthen questions ask you to identify the answer choice that
Best supports the argument. The correct answer choice simply helps the argument in some way.
Following are some examples of words or phrases used to indicate that your task is to strengthen the argument:
strengthen, support, helps, and
most justifies.
Following are several Strengthen question stem examples from actual LSATs:
“Which one of the following, if true, most strengthens the argument?”
“Which one of the following, if true, most strongly supports the statement above?”
“Which one of the following, if true, does most to justify the conclusion above?”
“Each of the following, if true, supports the claim above EXCEPT:”
How to Strengthen an Argument
- Identify the conclusion—this is what you are trying to strengthen!
- Personalize the argument.
- Look for weaknesses in the argument.
- Arguments that contain analogies or use surveys rely upon the validity of those analogies and surveys. Answer choices that strengthen the analogy or survey, or establish their soundness, are usually correct.
- Remember that the correct answer can strengthen the argument just a little or a lot. This variation is what makes these questions difficult.
Strengthen Incorrect Answer Traps
- Opposite Answers. These answers do the exact opposite of what is needed—they weaken the argument.
- In Strengthen questions, the Shell Game is usually used to support a conclusion that is similar to, but slightly different from, the one presented in the stimulus.
- Out of Scope Answers. These answers simply miss the point of the argument and support issues that are either unrelated to the argument or tangential to the argument.
Because Strengthen and Weaken questions require you to perform opposite tasks, to strengthen a causal conclusion you
take the exact opposite approach that you would in a Weaken question.
In Strengthen questions, supporting a cause and effect relationship almost always consists of performing one of the following tasks:
A. Eliminate any alternate causes for the stated effect.
B. Show that when the cause occurs, the effect occurs.
C. Show that when the cause does not occur, the effect does not occur.
D. Eliminate the possibility that the stated relationships
Remember, to
strengthen a
causal argument
you must perform
tasks that
are
opposite of those
that weaken a
causal argument.
Because the author believes there is only one cause (the stated cause in
the argument), (strengthen)
eliminating other possible causes strengthens the
conclusion.
Because the author believes that the cause always produces the effect
Because the author believes that the cause always produces the effect