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Discussion

Statements:

I. No window is a glass.

II. Some glasses are doors.

Conclusions:

I. No window is a door.

II. Some doors are not windows.

  • A.If only conclusion I follows
  • B.If only conclusion II follows.
  • C.If either conclusion I or II follows
  • D.If neither conclusion I nor II follows

Answer: B

Correct answer: If only conclusion II follows.

The glasses that are doors are, by the first statement, not windows - so some doors are not windows, conclusion II. Conclusion I excludes all doors from windows, which does not follow. Only II follows.

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