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In the question given below, two statements P and Q are given. Look into their logical acceptability and mark the correct answer.

P: All A's are B's. Some B's are C's. Therefore, some A's are C's.

Q: Some A's are B's. All C's are A's. Therefore, some C's are B's.

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Important Questions on Logic

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UPSC CDS
IMPORTANT

In the question given below, two statements P and Q are given. Look into their logical acceptability and mark the correct answer.

P: All A’s are B’s. All B’s are A’s. Some C’s are B’s. Therefore, some C’s are A’s.

Q: All A’s are B’s. Some B’s are C’s. Therefore, all A’s are C’s.

EASY
UPSC CDS
IMPORTANT

In the question given below, two statements P and Q are given. Look into their logical acceptability and mark the correct answer.

P: All B’s are A’s. All C’s are B’s. Therefore, all C’s are A’s.

Q: All C’s are A’s. Some B’s are C’s. Therefore, all B’s are A’s.

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UPSC CDS
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The question given below has a set of four statements. Each set of statements is further divided into three segments. Choose the alternative where the third segment in the statement can be logically deduced using both the preceding two, but not just from one of them.

A: X is an actor. Some actors are pretty. X is pretty.

B: Some men are cops. All cops are brave. Some brave people are cops.

C: All actors are brave. Some men are actors. Some men are brave.

D: All actors are pretty. X is not an actor. X is not pretty.

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UPSC CDS
IMPORTANT

The question given below has a set of three statements. Each set of statements is further divided into three segments. Choose the alternative where the third segment in the statement can be logically deduced using both the preceding two, but not just from one of them.

A: All beautiful things are sad. She is beautiful. She is sad.

B: All nice things are flat. TVs are flat. TVs are nice things.

C: Potatoes are stems. All stems are fruits. Potatoes are fruits.

MEDIUM
UPSC CDS
IMPORTANT

The question given below has a set of four statements. Each set of statements is further divided into three segments. Choose the alternative where the third segment in the statement can be logically deduced using both the preceding two, but not just from one of them.

A: All mammals are viviparous. Some fish are viviparous. Some fish are mammals.

B: All birds are oviparous. Some fish are not oviparous. Some fish are birds.

C: No mammal is oviparous. Some creatures are oviparous. Some creatures are not mammals.

D: Some creatures are mammals. Some creatures are viviparous. Some mammals are viviparous.

MEDIUM
UPSC CDS
IMPORTANT

The question given below has a set of four statements. Each set of statements is further divided into three segments. Choose the alternative where the third segment in the statement can be logically deduced using both the preceding two, but not just from one of them.

A: No S is P. All X is S. No X is P.

B: No S is P. All X is S. All X is P.

C: Some S is not P. Some X is S. Some X is not P.

D: Some S is not P. All X is S. All X is not P.

MEDIUM
UPSC CDS
IMPORTANT

The question given below has a set of four statements. Each set of statements is further divided into three segments. Choose the alternative where the third segment in the statement can be logically deduced using both the preceding two, but not just from one of them.

A: All good people are knights. All warriors are good people. All knights are warriors.

B: No footballers are ministers. All footballers are tough. Some ministers are players.

C: All pizzas are snacks. Some meals are pizzas. Some meals are snacks.

D: Some barkers are musk deer. All barkers are sloth bears. Some sloth bears are musk deer.

MEDIUM
UPSC CDS
IMPORTANT

The question given below has a set of three statements. Each set of statements is further divided into three segments. Choose the alternative where the third segment in the statement can be logically deduced using both the preceding two, but not just from one of them.

A: Ravens are black. Ravens are evil. All evil are black.

B: Horses are faster than eagles. All eagles are hawks. Horses are faster than hawks.

C: No priest is a saint. Peter is a priest. Peter is a saint.