AMCAT Logical Reasoning: Syllogisms 2

Question 1

All birds can fly. A penguin is a bird. Conclusion: A penguin can fly. This argument is:

Accepted Answer

Valid but unsound

Answer

Valid and sound

Answer

Invalid logically

Answer

Invalid — logical error

Question 2

Some students are athletes. All athletes are disciplined. Conclusion: Some students are disciplined.

Accepted Answer

True

Answer

False

Answer

Cannot be determined

Answer

Only if all students are athletes

Question 3

No reptile is a mammal. A whale is a mammal. Conclusion: A whale is not a reptile.

Accepted Answer

True

Answer

False

Answer

Uncertain

Answer

Partially true

Question 4

All M are N. Some N are O. Can we conclude 'Some M are O'?

Accepted Answer

No

Answer

Yes

Answer

Only if all N are O

Answer

Only if some M are N

Question 5

Some A are B. Some B are C. Conclusion: Some A are C.

Accepted Answer

May or may not be true

Answer

Definitely true

Answer

Definitely false

Answer

True only if all B are C

Question 6

All dogs are animals. All animals are living beings. No living being is a machine. Conclusion: No dog is a machine.

Accepted Answer

True

Answer

False

Answer

Uncertain

Answer

Partially true