Question:

Choose the ordered pair of statements where the first statement implies the second, and the two statements are logically consistent with the main statement.


Main statement: The computer will not work if operating system fails.
Statements: 1. Operating system fails. 2. Operating system does not fail. 3. The computer does not work. 4. The computer works. The ordered pair of statements is:

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When analyzing conditional statements, remember that the contrapositive is also valid. If "If A, then B" holds, then "If not B, then not A" also holds.
Updated On: Aug 14, 2025
  • 2, 1
  • 2, 3
  • 1, 4
  • 4, 2
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The Correct Option is D

Solution and Explanation

The main statement is "The computer will not work if operating system fails," which can be written as:
\[ \text{If operating system fails, then computer will not work.} \quad (\text{OS fails} \to \text{Computer does not work})
\] This is a conditional statement.
Analyze the options:
- Statement (1) says "Operating system fails", which would imply that the computer does not work. However, it is not immediately relevant to the correct logical pair, as we are looking for a statement indicating that the computer works.
- Statement (4) says "The computer works", which contradicts the main statement that the computer does not work when the operating system fails. This makes the computer working inconsistent with the failure of the operating system. Therefore, if the computer works, the operating system did not fail, i.e., the operating system does not fail.
- Statement (2) says "Operating system does not fail", which directly follows from statement (4) "The computer works" (as the computer will work only if the operating system does not fail). Therefore, statement (4) leads to statement (2).
Thus, the correct pair is (4, 2), where: - "The computer works" (statement 4), - "The operating system does not fail" (statement 2).
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