Discussion
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements. Statements: All doors are windows. Some windows are drawers. All drawers are wood. Conclusions:
I. Some wood are windows.
II. Some drawers are windows.
III. Some wood are doors.
Answer: B
Only conclusions I and II follow. The statements give a chain: all doors are windows, some windows are drawers, all drawers are wood. "Some windows are drawers" is reversible, so "Some drawers are windows" follows (II). Because every drawer is wood, those drawers that are windows are wood, so some windows are wood, and the reverse "Some wood are windows" follows (I). Conclusion III, "Some wood are doors", would need a drawer that is also a door, but the statements only say all doors are windows and some windows are drawers; the doors and the drawers among the windows may not overlap, so III does not follow. Hence only I and II follow.
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