Statements: No student is careless. Some careless people are drivers. Which conclusion follows?
- A. Some drivers are not students
- B. No driver is a student
- C. All drivers are careless
- D. Some students are drivers
Explanation
The drivers who are careless cannot be students, since no student is careless, so at least some drivers fall outside the student group. Extending this to all drivers is unwarranted, because the remaining drivers are unaccounted for. A negative premise always yields a negative conclusion.
Related questions
If all surgeons are doctors and some doctors are researchers, which conclusion definitely follows?
Statements: All cats are mammals. All dogs are mammals. Conclusion: All cats are dogs. This conclusion is
Statements: Some pens are books. All books are papers. Which conclusion follows?
Statements: Some doctors are writers. Some writers are poets. Which conclusion follows?
Statements: All engineers are graduates. Some graduates are unemployed. Which conclusion follows?