Some doctors are writers — Syllogisms Aptitude Question
Some doctors are writers: Statements: Some doctors are writers. All writers are educated. Conclusions: I. Answer and worked solution on CodeKairo.
- Topic: Syllogisms
- Section: Logical Reasoning
- Difficulty: Medium
- Time target: 75 seconds
Question
Statements:
- Some doctors are writers.
- All writers are educated.
Conclusions: I. Some doctors are educated. II. All doctors are educated.
Which conclusion follows?
Options
- Only I
- Only II
- Both
- Neither
Show the answer and the worked solution
Correct answer: A. Only I
Worked solution
- Some doctors are writers, and all writers are educated, so those doctors are educated: I follows.
- The other doctors may or may not be educated, so II does not follow.
Answer: Only I.
The idea
A 'some' premise can only produce a 'some' conclusion. Upgrading it to 'all' is never valid.
Shortcut. Draw it: doctors partly overlap writers, and writers sit inside educated. The overlap is educated (I), but the other doctors can lie outside educated, breaking II.
Common trap. "Both" — upgrading 'some doctors are educated' to 'all'; only the doctors who are writers are known to be educated.