Syllogistic Reasoning Flashcards
7 cards from real GCAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Syllogistic Reasoning flashcards as text
All doctors are scientists. Some scientists are professors. Which conclusion is valid?
Answer: No conclusion can be drawn about doctors and professors.
The link between doctors and professors cannot be established because 'some scientists are professors' does not tell us which scientists.
No fish are mammals. All whales are mammals. Which conclusion follows?
Answer: No whales are fish.
Since no fish are mammals and all whales are mammals, whales and fish share no members.
All A are B. All B are C. No C are D. What can be concluded about A and D?
Answer: No A are D.
A is a subset of B, B is a subset of C, and C excludes D entirely, so A cannot be D.
Some managers are leaders. All leaders are communicators. Which must be true?
Answer: Some managers are communicators.
The managers who are leaders must also be communicators, so at least some managers are communicators.
All poets are dreamers. No dreamer is a banker. Which is valid?
Answer: No poet is a banker.
Poets are dreamers and dreamers exclude bankers, so poets and bankers cannot overlap.
Some athletes are vegetarians. Some vegetarians are doctors. Which conclusion is valid?
Answer: No valid conclusion about athletes and doctors.
Two 'some' statements sharing a middle term do not allow any definite conclusion.
All red objects are heavy. This ball is not heavy. What follows?
Answer: This ball is not red.
By contrapositive: if not heavy, then not red.