Question

Statements: All windows are doors. No door is wall.
Conclusions:
I. No window is wall.
II. No wall is door.

• A. Only conclusion I follows
• B. Only conclusion II follows
• C. Either I or II follows
• D. Neither I nor II follows
• E. Both I and II follow

Answer 1

The correct option is E Both I and II follow

Since both the premises are universal and one premise is negative, the conclusion must be universal negative. Also, the conclusion should not contain the middle term. So, I follows. However, II is the converse of the second premise and thus it also holds.