Tips and Tricks on Syllogism

Study Material on Syllogism

Practice Questions on Syllogism

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Tip #1

Solve the questions through a Venn Diagram. Always make sure common areas are shaded do give you a correct answer.

Tip #2

Shortcut rules (if Venn Diagrams are confusing you) between Statement 1 and Statement 2 in that order
All + All = All
All + No = No
All + Some = No Conclusion
Some + All = Some
Some + Some = No Conclusion
Some + No = Some Not
No + No = No Conclusion
No + All = Some not reversed
No + Some = Some not reversed

Tip #3

You can cancel out common terms in two statements given, then on the remaining terms apply the syllogisms rules and solve. E.g. Some dogs are goats, All goats are cows. Cancel out "goats" which leaves us with Some dogs are...all are cows. Important words remaining are ALL and SOME in that order. SOME + ALL = SOME, hence conclusion is SOME dogs are cows.

Tip #4

Interchange between reading the question as well as the conclusion before arriving at the answers. Always evaluate each and every conclusion to find out how many conclusions are possible.

Tip #5

Avoid using common knowledge as Syllogisms questions usually state unnatural statements

Tip #6

Remember some implications
All <=> Some, e.g. All A are B also implies Some A are B (being a subset) and Some B are A
Some <=> Some, e.g. Some A are B also implies Some B are A
No<=> No, e.g. No A are B also implies No B are A