Question 39
MediumOriginal questionAssume the statements are true.
Statements: No sparrow is a crow. All crows are ravens. All ravens are finches.
Conclusions:
I. No sparrow is a finch.
II. Some finches are not sparrows.
Show the answer and explanation
CorrectNot quiteAnswer B
Correct answer: B
Explanation
Every crow is a raven and every raven is a finch, so every crow is a finch.
Those finches (the crows) are not sparrows, because no sparrow is a crow. Some finches are not sparrows: II follows.
Sparrows are kept out of the crow circle only. They may still be finches, so I is not definite.
Only II follows.
Worth noting
An exclusion from the small group (crows) never passes up to the bigger group (finches).
- Concept
- No + All + All gives Some … not
- Typical timeTypical
- 70 s
- Your timeYours
- —
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