syllogism tricks with venn diagram - Wikitechy

Statements: Some children are adults. Some adults are not old

Editor — Wed, 18 Aug 2021 13:36:07 +0000

The question contains some statements followed by some conclusions. Decide which of the given conclusions logically follow from the given statements, disregarding commonly known facts.
Statements:
Some children are adults.
Some adults are not old.
Conclusions:
I. Some children are not old.
II. Some children are old.

A . Only conclusion I follows

B . Only conclusion II follows

C . Neither I nor II follows

D . Both I and II follow

Answer : C . Neither I nor II follows

Statements: All parks are roads. Some roads are mall

Editor — Wed, 18 Aug 2021 13:20:54 +0000

The question contains some statements followed by some conclusions. Decide which of the given conclusions logically follow from the given statements, disregarding commonly known facts.
Statements:
All parks are roads.
Some roads are mall.
Conclusions:
I. All malls are roads.
II. All malls are parks.
III. Some parks are malls.
IV. No park is a mall.

A. Only I follows.

B. Only II follows.

C. Either I or II follows.

D. Only III and IV follows.

E. None follows

Answer : E. None follows

Statements: All files are folders. All folders are boxes. All boxes are drawers

Editor — Wed, 18 Aug 2021 13:14:37 +0000

The question contains some statements followed by some conclusions. Decide which of the given conclusions logically follow from the given statements, disregarding commonly known facts.
Statements :
All files are folders.
All folders are boxes.
All boxes are drawers.
Conclusions :
I. All folders are drawers.
II. All boxes are files.
III. All files are drawers.
IV. All drawers are folders

A. Only I and II will follow

B. Only I and III will follow

C. Only II and III will follow

D. All follows

Answer : B. Only I and III will follow

Statements : All birds are dogs. No dog will bark.

Editor — Wed, 18 Aug 2021 13:10:18 +0000

The question contains some statements followed by some conclusions. Decide which of the given conclusions logically follow from the given statements, disregarding commonly known facts.
Statements :
All birds are dogs
No dog will bark
Conclusion :
I. Some barking things are birds.
II. No bird will bark.

A. If only I follows

B. If only II follows

C. If either I or II follows

D. If neither I nor II follows

E. If both I and II follow

Answer : B. If only II follows

Explanation:

Conclusion I, positive, does not follow. Conclusion II, negative, follows. As negative conclusion II is “some barking things are birds”, we cannot draw an alternate diagram for conclusion II, Hence II follows.