All A are B
Universal Affirmative. Circle A is inside Circle B.
Logical Reasoning
Verify statements and check which conclusions follow logically. Learn the Venn diagram method and standard deduction rules.
Syllogism questions give two or more statements and ask which conclusions must follow. The reliable toolkit is the Venn diagram method: draw every possible layout the statements allow, and a conclusion follows only if it is true in ALL layouts. Complement that with the conversion rules ("Some A are B" converts to "Some B are A", but "Some A are not B" never converts) and you can handle even the trickiest "either-or" pairs.
Universal affirmative, universal negative, particular affirmative, and particular negative statements.
Universal Affirmative. Circle A is inside Circle B.
Particular Affirmative. Circles A and B overlap.
The recurring question patterns in this topic — know the shape of each pattern before you solve.
"All A are B; all B are C" yields definite conclusions.
All cats are animals; all animals are living → All cats are living.
"No A is B" makes the circles disjoint.
No pen is a pencil.
"Some A are B" only fixes a partial overlap.
Some books are pens.
"Some A are B" and "No A is B" form a complementary pair when no definite link exists.
Some papers are files; some files are folders → either I or II.
Conclusions with "can be" or "are not" require checking all diagrams.
Some dogs are cats; no cat is a cow.
High-signal questions with full solution flow across difficulty patterns.
Classic exam problems worth internalizing — each one ships a complete step-by-step solution.
Draw all possible layouts of circles. If a conclusion is false in even one diagram, it does not follow.
Where most students lose marks — review these before you sit the test.
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