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47.
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All
Lamels are Signots with buttons.
No yellow Signots have buttons.
No Lamels are yellow.
If the first two statements are true, the third statement is
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A.
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true
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B.
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false
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C.
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uncertain
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Answer: Option A
Explanation:
We know that there are Signots with buttons,
or Lamels, and that there are yellow Signots, which have no buttons. Therefore,
Lamels do not have buttons and cannot be yellow.
