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

Only conclusion I follows
Only conclusion II follows
Either I or II follows
Neither I nor II follows
Both I and II follow

Correct Answer: Both I and II follow

Explanation:

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,

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