Inference / Must Be true Flashcards
(39 cards)
HOW TO APPROACH EVERY CR PASSAGE
For each sentence;
- Read words carefully & take note of modifiers, indicators, language.
- Summarize the main gist
“What is the simple story here?”
- Determine scope. Ask:
“What are they saying vs not saying?”
- Opinion vs fact
“Is this an Opinion or fact?”
- Determine the purpose. Ask:
“Why is the author telling me this?” (eg. to illustrate an example, to provide background context)
- Make the inferencial connection with previous sentences: Ask:
“How does this info connect to the previous sentence?” “What inference can I draw from combining the previous sentences with this?”
- Determine the logical flow; Ask:
“Does this support the previous sentence or does the previous sentence support this?”
- Determine the main point/main conclusion and note the scope of what it actually says.
“What is the main point/conclusion here & what is the scope of elements in this?”
For Each passage
- Identify presence/absence or an argument
“Is there a conclusion?”
- If no conclusion , identify the heart of the passage
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A set of facts → inference/must be true/find the conclusion
Paradox → resolve the paradox
` - If yes conclusion, Map the logical link in a flow chart: [Premise → assumption → logical gap → Conclusion]
* Identify the premise that directly supports the conclusion & its scope
* Determine the Core Assumption:
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“What new elements are there”
“How did the author make this jump from premise to conclusion”
“What must I assume to me true for me to believe this conclusion”
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* If the assumption is not so clear, use the Falsification condition. Ask:
“Under What circumstances , given the [Facts] in the argument, will the [conclusion] not hold”
* Identify the logical gap“Am i fully convinced by this argument i.e is the argument weak or strong?” “What extra evidence is missing here that i need to be fully convinced?”
For each question stem:
- Carefully read and identify the question stem.
“What is this question stem asking of me?”
- After reading the question stem, take a moment to mentally recap details you just gathered and define what you are looking for
- Rephrase the question into a yes/No format will enable you to eliminate and choose the right answer with precision.
- Always read each of the five answer choices completely. Ask yourself…
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“What is this option simply saying”
“Does it answer …rephrased question..?”
` - Eliminate any answer choice that doesn’t answer your question
What “Clue” makes you suspect inference?
The Passage is a set of facts (without a conclusion)
There’s no paradox
This does not mean that a passage with a conclusion cannot still be an inference question.
An inference is possibly / likely true
True or false
False
An inference “Must be true” or is “certain to occur”, given the facts set forth.
It Demands “necessity” not “Possibility”
It must be fully supported by the passage
An Inference answer choice that is true in the real world is always correct.
True or false
False
Any answer choice that is plausible but is not fully supported by the passage is INCORRECT
Question stems of Inference questions
If the statement above is true, which of the following can be properly inferred/concluded?
if the information above is correct, which of the following must also be true?
IF the statements above are true, which of the following can be properly drawn?
Inference is part of which family information model?
First family information model
Where the stimulus is taken as FACTS and no additional information can be brought in.
The answer choices are determined from the stimulus
(Arrow down from stimulus to answer choices)
In Inference, an answer choice that adds additional outside info can be correct
True or False?
True, only if …
the answer choice is strongly supported by the passage and must be true given the facts
Any inference answer choice that brings in outside info not supported by the passage is INCORRECT
Broad scope indicators vs Narrow scope indicators
In Must Be True questions you are like the detective Sherlock Holmes, looking for clues in the stimulus and then matching those clues to the answer choices.
Words like “some,” “could,” and “many” encompass many different possibilities and are BROAD SCOPE indicators.
Words like “must” and “none” indicate a NARROW SCOPE indicators.
Some
Broad/Narrow scope?
Broad scope
Could
Broad/Narrow cope?
Broad scope
Many
Broad/narrow scope?
Broad scope
Must
Broad/Narrow scope?
Narrow scope
None
Broad/Narrow scope?
Narrow scope
Common Inference question traps
Test takers will change the modifiers in answer choices to test your attention to detail.
strategy - read carefully and note all modifiers.
Correct answer types of Inference/Must-be-true questions
- Answers that are conclusions based on the entirety of statements in the passage
2.Answers that are fully supported by small portions of the passage (paraphrased answers or inference from combining 2 or more statements in passage)
3.Answers supported by numerical info throughout the passage
4.answers supported by maths info in small portions of the passage
5 Incorrect answer types (Traps) of inference/must-be-true questions
- Could be true / likely to be true answers
- Exaggerated answers
- Answers that present information in the stimulus
in a distorted way- Reversed answers eg (if/then..)
- opposite answers
- the shell game
- Answers that bring new info that is not supported by the passage
- Answers that are true in real world but not
supported by the passage.
Some environmentalists question the prudence of exploiting features of the environment, arguing that there are no economic benefits to be gained from forests, mountains, or wetlands that no longer exist. Many environmentalists claim that because nature has intrinsic value it would be wrong to destroy such features of the environment, even if the economic costs of doing so were outweighed by the economic costs of not doing so.
Which one of the following choices are obviously incorrect
(A) It is economically imprudent to exploit features of the environment.
(B) Some environmentalists appeal to a noneconomic justification in questioning the defensibility of exploiting features of the environment.
(C) Most environmentalists appeal to economic reasons in questioning the defensibility of exploiting features of the environment.
(D) Many environmentalists provide only a noneconomic justification in questioning the defensibility of exploiting features of the environment.
(E) Even if there is no economic reason for protecting the environment, there is a sound noneconomic justification for doing so.
Choices (A) & (E) are obviously incorrect
Because;
the author repeats the opinions of others and never makes an assertion of his or her own.
(A) and (E) make factual assertions
Opinions ≠ Assertions/Facts
When a stimulus contains only the opinions of others, then in a Must Be True question you can eliminate any answer choice that makes a flat assertion without reference to those opinions.
“opinions” in a passage do not let us know the “actual facts” of the situation.
Passage : Many boys play ball
Ans choice: Some boys play ball …True or False?
True
If “many” boys play ball, it must be true that at least “some” boys play ball.
Inference vs Assumption
- An assumption is an unstated fact that swerves as a bridge between the premise and conclusion, While an Inference is an unstated conclusion derived mainly from the premise
- An Assumption occurs before the argument/conclusion, while the argument is being formed. While, an Inference occurs after the argument is complete
- An assumption must be true in order for the argument to be valid, While an Inference must be true based on the information presented in the argument.
Rethinking to Predict the answer is a good strategy
True / False
False
Don’t waste your time rethinking to predict.
Instead, before jumping to the answer choices, Prethink to understand connections/assumptions - try to synthesize and intimately understand the facts as well as how they connect to each other. Also know the main point and think of the authors purpose (what is he trying to make me understand?)
Inference question require you to look for a main conclusion
True or False
False
You are looking for a choice that says something that must be true given the facts stated in the passage.
True / Exaggerated?
Some of A
= All of A
Exaggerated
Some ≠ All
True or False?
Not Guaranteed ≠ Unlikely
True
Not guaranteed - Probability < 95%
Unlikely - Probability < 50%
True or False?
Guaranteed = Likely
False
Likely - Probability > 50%
Guaranteed - Probability > 95%