Statements: All fish are tortoise. No tortoise is a crocodile. Conclusions: (I) No crocodile is a fish. (II) No fish is a crocodile.
Correct answer: D. Both I and II follow
- A. Only conclusion II follows
- B. Either I or II follows
- C. Neither I nor II follows
- D. Both I and II follow
Explanation
The Venn diagram shows that No crocodile is a fish. If No crocodile is a fish then No fish is a crocodile. Both conclusions I and II follow. Hence, D is the correct option
Last updated
About Syllogisms
Syllogisms use categorical statements such as all, some and no to establish relationships between groups. Questions require checking whether conclusions necessarily follow from the premises, often by mental set relationships or Venn diagrams, and distinguishing valid deductions from conclusions that are merely possible.
Practise Syllogisms
40 free Syllogisms MCQs from Analytical and Logical Reasoning, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Analytical and Logical Reasoning questions like this
Analytical and Logical Reasoning is on 24 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
All children are silly people. Some silly people are rich people. All rich people are big shots. Which of the following conclusions are NECESSARILY TRUE?CONCLUSIONS:I. Some silly people are children.II. Some rich people are children.III. Some silly people are big shots.
All daffodils are plants. All plants are living things. Some living things are real. Conclusions: I. All daffodils are living things. II. Some living things are flowers. III. All daffodils are real. Which conclusions follow?
All hammers are tools. Some tools are useless things. All useless things are trash. Which of the following is NECESSARILY TRUE given only the information above?ConclusionsI. Some hammers are trash. II. Some tools are trash.III. All useless things are tools.
If all surgeons are doctors and some doctors are researchers, which conclusion definitely follows?
In syllogistic reasoning, a conclusion containing the word all can follow only if