Statements: All roses are flowers. All flowers are plants. Conclusion: All roses are plants. This conclusion is
- A. valid
- B. invalid
- C. possibly true only
- D. contradictory
Explanation
Two universal affirmative premises that share a middle term chain together, placing roses inside flowers and flowers inside plants. This is the classic Barbara syllogism and it is always valid. Nesting three circles on paper confirms it in seconds.
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: No student is careless. Some careless people are drivers. Which conclusion follows?
Statements: Some doctors are writers. Some writers are poets. Which conclusion follows?