题目内容

No Fords are Pontiacs（庞蒂克）. All Escorts are Fords. So, some Escorts are not Pontiacs.

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No landlubbers （新水手）are sailors. Some sailors are not pirates. So, some pirates are not landlubbers.

No fish are reptiles. All trout （鲑鱼）are fish. So, some trout are not reptiles.

Some butchers （屠夫）are not bakers（烘焙师）. No butchers are candlestick（烛台） makers. Therefore, some candlestick makers are not bakers.

No one who is a Nobel Prize winner is a rock star. A number of astrophysicists （天体物理学家）are Nobel Prize winners. Therefore, a number of astrophysicists are not rock stars.