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Difficulty: MediumValue vs. Yes/No Data Sufficiency Decision Logic

In a GMAT Data Sufficiency 'Yes/No' question, if a statement allows us to establish conclusively that the answer to the question stem is 'No' under all permissible conditions, that statement is deemed insufficient because the outcome is negative.

Answer: Answer

Answer

The statement is False. In GMAT Data Sufficiency, a statement that leads conclusively to a 'No' answer is sufficient.
The claim is false because sufficiency in GMAT Data Sufficiency Yes/No questions is defined by certainty, not by a positive outcome. A statement that proves a condition is always false produces a definitive 'No', which fulfills the requirement for sufficiency. Insufficiency occurs exclusively when a statement is ambiguous (i.e., yields 'Yes' under some cases and 'No' under others).

Step-by-Step Solution

1
Define sufficiency for a GMAT Data Sufficiency 'Yes/No' question
A statement is sufficient if it yields a single definitive answer (always 'Yes' or always 'No').
Data Sufficiency tests whether a conclusive determination can be made from the given information.
2
Evaluate the condition described in the prompt
The statement guarantees that the answer to the question stem is 'No' in 100% of cases.
Since there are no cases yielding a 'Yes', the outcome is consistent and unambiguous.
3
Compare the evaluated condition against the claim in the stem
The claim states that a definitive 'No' makes the statement insufficient, which contradicts Data Sufficiency rules.
Insufficiency occurs only when a statement allows both 'Yes' and 'No' outcomes (a 'Maybe').

Key Concept

Definitive Yes/No Sufficiency Rule
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Topics

Value vs. Yes/No Data Sufficiency Decision Logic

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