Statements: Some windows are doors. Some doors are walls.
Conclusions:
I. Some windows are walls.
II. No window is a wall.

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A Only conclusion I follows
B Only conclusion II follows
C Either conclusion I or II follows
D Neither conclusion I nor II follows

Show answer and explanation

Answer: C. Either conclusion I or II follows

Both conclusions contain the exact same elements (windows and walls).Separately, both conclusions are unproven/uncertain. They form a complementary pair (Some + No). In reality, windows and walls either intersect or they do not—there is no third option. Therefore, one of them must be true.

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Statements: Some windows are doors. Some doors are walls. Conclusions: I. Some windows are walls. II. No window is a wall.

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Statements: Some windows are doors. Some doors are walls.
Conclusions:
I. Some windows are walls.
II. No window is a wall.