Instructions

Below are given three statements a, b and c followed by four conclusions. You have to take the given statements to be true even if they appear to be at variance with commonly, known facts, and then decide which of the conclusionslogically follow(s) from the given statements. For each question, mark out an appropriate answer choice that you think is correct.

Question 112

Statements:
a. Only stars are moons.
b. No cosmosis star.
c. No planets are moons.
Conclusions :

I. Some moonsare notplanets.
II. No moon is a cosmos.
III. No cosmosis a planet.
IV. No stars are planets.

Solution

Only stars are moons, which shall be interpreted in this way: All moons are stars. 

We shall verify each option:

1. Some moons are not planets: Since we know that only stars can be classified as moons, it is always true that some moons are not planets. 

2. No moon is a cosmos: We know that only stars are moons; this is again, a valid conclusion. 

3. No cosmos is a planet: We have no relation given for planet and cosmos; hence, we cannot say for sure whether some cosmos are planets or not. 

4. No star is a planet: We have no relation given for stars and planets. We only know that no planets are moons. However, there might or might not be stars which are not moon but are planet indeed. 


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