Question:
Which among the following propositions will be the ‘sub-contrary’ of ‘Some celestial bodies are not shining entities’?
Which among the following propositions will be the ‘sub-contrary’ of ‘Some celestial bodies are not shining entities’?
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For logical relations like sub-contrary, remember the principle: both cannot be false, but both can be true.
Updated On: Jan 24, 2025
- All celestial bodies are not shining entities
- No celestial bodies are shining entities
- Some celestial bodies are shining entities
- Some shining entities are celestial bodies
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The Correct Option is C
Solution and Explanation
In logic, sub-contrary propositions are those where:
- Both cannot be false simultaneously.
- Both can be true.
Given the proposition Some celestial bodies are not shining entities, its sub-contrary will be: Some celestial bodies are shining entities. If the original statement is false (all celestial bodies are shining entities), the sub-contrary must be true. If the original statement is true, the sub-contrary may also be true.
- Both cannot be false simultaneously.
- Both can be true.
Given the proposition Some celestial bodies are not shining entities, its sub-contrary will be: Some celestial bodies are shining entities. If the original statement is false (all celestial bodies are shining entities), the sub-contrary must be true. If the original statement is true, the sub-contrary may also be true.
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